@PrioritySeven: I kinda doubt that BF3/MW3 will even get five stars. MW3 is too much the same old stuff. It almost feels like a sports series. And BF3 is more about technical then gameplay innovation. Its the core BF2 concepts put on a new engine and some Bad Company sprinkled in. I also very much doubt that DICE can deliver a 5-star single player, which will hit the "average score". I will still play the heck out of it. AC: Revelations may also get hit by "same old", however we said this about Brootherhood as well.
Anyway. What I am saying is that Portal 2 and Dead Space 2 are 2011 games, which already got 5 stars on GB. Also I forgot "L.A. Noire". For me easily the technical most impressive game of this year.
Early reviews of BF3 have been super high so far. Campaign has been cited as average though so I doubt it'll be a contender. Frankly, it is just a prettier version of BF2 which, while incredible at the time, may not be enough for it to stand up to the likes of this, Batman, Portal and Skyrim. And my personal favourite, The Witcher 2.