have just rerolled to a new server and and am going be a tank in WotLK
so i was wondering does anyone know if the warrior's will be the perferred maintank?
Blizzard intends for the tanking spot to be homogenised for all tanking classes.

Meaning that druids, warriors, death knights, and paladins will all be able to maintank, with no need to go for a specific class to min/max your raid.

So go with playstyle and preference, as they all will have similar skills now.

My personal uneducated opinion is that, If nothing were to change, I'd go prot pally or druid, as they have the ability to dps, heal or maintank if you ever get sick of one specific role, while warrior will still have trouble getting into 5mans if they're anything other than tanks.
OR people will still regard paladins as "thrash tanks" which is the most insulting thing to be called.
Any prot pally will get into a 5 man. And if you guild cant see a prot pally MT, time to find a better guild.
Crushing Blows were removed from raid bosses, no such thing as a thrash tank now.
It's too soon to tell. That being said, it's most likely that Warriors will remain the preferred main tanks for 25 man raids.
Well it all depends on various factors. 1st and foremost, play the one you enjoy. Many people prefer 1 type of tank over another, this is because of the people behind the toon. All three are solid, people start disliking some types of tanks but what they don't realise is that they are playing with bad players. My feral is a main, I'm leveling up a Warrior who I am considering tanking with in Wrath just for the use of a Sword'n'Board as well as more tricks that come with being so deep into Protection. I am kinda growing tired of looking at my bear butt, but with the incoming changes for Ferals, and Glyphs, my interest might be renewed.
Other than DK's being the best for tanking heavy magic damage and pally's for multi target aoe, I don't think you can really go wrong as a warrior.

But like PiratePants said bliz is aiming for everything to be able to get the job done, so play what appeals to you rather than worrying about what is the "best".
While this isn't a bad sentiment, I would also encourage you to play the tank that best fulfills the role you want to have. You want to be a MT, so chances are that you will be required to be a warrior, despite the pie-in-the-sky fairy tales that Blizzard is trying to shove down our throats.

There might be a degree of parity early on, i.e. Paladins and Druids might perform just as well as warriors in a MT role. I would imagine that the chances are very good that things will eventually shift back to the way they are now, though. Warriors will most likely reign supreme as Main Tanks, Druids will be awesome off-tanks, Death Knights will tank casters, and Paladins... we get to be trash (tanks).

Despite my gloomy outlook for the Paladin class, it's impossible to tell at this point what Blizzard has in store for the expansion and the inevitable class balance patches that will follow.
What makes you say that? Blizzard has states several times that having a different tank will not hinder you or your guilds progression.

Take a look at prot pallys new skills for example, they have several versions of warrior skills right now.
Pally's Shield Slam
Pally's Thunder Clap
Passive Shield Block (of sorts)
Shield Wall
Taunt (I know pallys already have it, but the cooldown has been reduced making it rediculously good)
Reckoning procing off blocks now
Updated Sanctuary fixing mana problems
Lay On Hands has been buffed to shorter cooldown and no mana loss. (Better last stand anyone?)
Add this ontop of pallys having more utility than warriors, and you see that prot pallys will easily be equal with warriors, if not better.

Warriors have gained more damage, aoe capabilities, and some really nice new skills for both pvp/pve. This is the trade off for warriors no longer being the best MT.

With the removal of crushing blows, it really won't matter what type of tank you have.

PS - I didn't mention feral druids as I know little about them, and I refuse to speculate on things i know nothing about.
The MT concept is pre-TBC. Nowadays there is no MT, but a tank team because most bosses need more than 1 tank anyway.
I believe it will stay that way.
It will be turning that way.

Currently in BC to attain the best possible raid setup the tanks have strengths where the others have weaknesses.

For example, until patch 3.0 is released this is the toned down generalisations.
Warriors are excellent main tanks, and are also the most durable, however cannot dps, nor aoe tank very well, if at all
Druids have a large amount of health and armour, and can switch to dps when not needed, however have trouble reaching uncrushibility. This makes them ideal offtanks
Paladins are excellent aoe tanks with limited main tank capability, and have issues with spellcasters or slow hitting bosses
Come Wrath blizzard are eliminating these specific class strengths and weaknesses. Warriors can aoe tank, and dps well enough when not tanking, and pallys and druids can maintank to the level warriors are at the moment.

This is to prevent raids needing specific classes to progress, which is a step in the right direction. You don't need class X to proceed, just enough classes to full all the roles of a raid, and some skill.

So if you need 2 tanks, you take 2 classes that can tank. Rather than being forced to bring a warrior (or insert any other class) to give you the best chance at progressing.
Based on the beta paladin changes so far, the only real concern I see for prot paladin viability is mana. With the change to spell mana cost protadins look to be hurting for mana. When blizz addresses that issue, I think paladins and warriors will be equivalently viable main tanks.

(I can't speak about death knights and druids yet as I just don't have enough experience with them to judge)
I would personally prefer making a Warrior or Death Knight as a tank, since to be honest.. They are the most.. well.. to be honest, they just are the coolest ones, and well heres a few known facts why I want them instead of the other classes:

Paladin
-Requires mana to keep aggro on monsters, not so funny when they finally run out of mana. Even tough they gain mana when they get healed, its still not enough sometimes.
-Horde Paladins: You HAVE to be a blood elf.
-Can buff Blessings to thers, always wanted in raids

Druids:
-Cant wear Mail items, Plate items, or shields. So yeah, I dont like those facts..
-Can get good health and armor by switching into Dire Bear Form.

Warrior:
-Depends the most on their gear
-No buffs to others, expect for shouts.

Death Knight:
-Can tank without a shield, ambitious about how this works.
-Has the "Runic energy" system. Seems interesting if you ask me, and by puttin a few points on "Blood" talent tree aswell it can restore some health from itself.
The warrior class has actually been removed in WOTLK. All current warriors have been replaced with Retribution Paladins.
This is mockery. Yes, we might have some issues with spellcasters, (mainly those designed to require spell reflection), but limited main tank capability? Which tank's threat scales better than that of a paladin? Which tank, when properly geared, is the one who has the lowest chance of being struck by a crushing blow? Which tank... has the panic buttons? Not us, perhaps, but if you can't manage without cooldowns, you need to think again.

There is, however, an issue with all the people who play holy in an excellent manner, gathering tanking gear and respeccing because palidans r imba tankz for heroics and the proceeding to mash their Consecration button. But what class does not suffer from idiots?
due to bear form, druids dont need plate or shields and in cat form they can dps better than either a paladin or a warrior all with the same spec.
i  would personally prefer making a Warrior or Death Knight as a tank, since to be honest.. They are the most.. well.. to be honest, they just are the coolest ones, and well heres a few known facts why I want them instead of the other classes:

Paladin
-Requires mana to keep aggro on monsters, not so funny when they finally run out of mana. Even tough they gain mana when they get healed, its still not enough sometimes.

Hate to burst your divine shield on the mana issues there, but with the newly re-worked blessing of sanctuary every time you dodge, block or parry you get mana back. And with the new judgement of wisdom you get mana back as well. The only time I saw issues with mana was when I wasn't actually the MT. So as far as to what I can see there's nothing uncool about Prot. Paladins.
At my opinion the best mt at raid's is the warrior.. Beacuse it has lot's of dodge/parry/block and also has the best agro skill's also as a second tank i would like a paladin as it's a very usefull multi tank.
You paladins sure are a competitive lot. I guess thats just insecurity from knowing you are inept boss tanks (or were pre-patch).

I just wanted to let you guys know that the patch has given warriors equal (if not superior) aoe threat to paladins. I can make this call after tanking the hyjal trash waves on my prot warrior for a couple of clears now. The only other tank in the raid both times was another prot warrior. I did a better job on my warrior than any paladin I have raided with.

Paladins should be happy though. While they have lost their niche, they have gained the ability to actually tank a boss. Pre-patch the difference between paladins and warriors for boss tanking was immense. Sure, paladins could physically do it, but compared to a warrior, they were simply inept.

The patch changed this though. I have a paladin tank, and now when I tank a boss on him, I no longer feel gimped in comparison to my warrior.

Anyway, to answer your question, the main tanks in wotlk will continue to be warriors. Now this has a lot to do with tradition and such, but in the end it will just be because warriors will outperform the other tanks (but by a smaller margin than before).
Way to contradict yourself.
Blizz stated they want ALL tanks to be equally MT viable, why would warriors be a bit better then? If you don't know what you're talking about, please refrain yourself from posting and having babies spreading your retardness. But I don't think the second one will be a problem..   wow power leveling