Well there are other games that would keep people busy. The Wii U is suppose to be released this year and RE6 might get released for that as well. 2014 would be so bad. You see how well RE4 turned out with the extra development time.
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I would say most likely 2013. Then again, they have said they have around 600 people all together working on this game. So it is very possible this game will be released in 2012. Also as far as the trailer goes, I dont think they would show that much of the game if it wasnt close to being finished. This reveal trailer for RE6 is like the last trailer we got for RE5, right before it released.
i was reading an article a while ago about capcom wanted resident evil 6 done as soon as possible. i think it would be ready by november. i kind of would be upset if they delayed it especially since they released a trailer. now we are all looking forward to it.