Don't get me wrong, Pokemon X and Y will be amazing, the bright new step towards the future of the Franchise. However, I can't help feeling that it won't be enough as they are not innovative as a whole... The concepts are still antiquated (Not old, antiquated).
Another the major thing for me it's the absence of story within the game. It's not bad per se and works perfectly with the franchise. Won't be enough to beat the biggest favorites, though, like The Last Of Us (My top choice for now), Bioshock: Infinite and possibly others...
I don't think anyone here was going to consider Pokemon X & Y as GoTY lol...sure the game will be awesome, even revolutionary to the series but remember all the hate that surrounds pokemon and the fact that is on a handheld.
These are the games that had the best chance for me but when we've already had Tomb Raider and BioShock and then GTA next month it's going to be hard. Plus there is the Walking Dead of this year with Gone Home.