I highly doubt that Splatoon would receive any award as a game of the year contender. I'm not sure if I'm the only one, but I didn't find Splatoon that fun and after completing a rather average single-player and a few hours in multiplayer, I strangely got bored of the game. I had some fun, but that was because I had nothing else to play once I got the game around launch. I'm aware that there's new content being added for free, but it my previous lasting impressions aren't even good, then I don't see why should I play the game again.
As for the topic of game of the generation, there's a very misguided thought that only open world and mature games can earn a game of the year award, which is not true at all. I mean, Uncharted 2 and The Last of Us aren't even open world games and look how many awards they got, it's amazing. Also, Nintendo games earn their fair share of awards, and many of them aren't even rate Mature.
So if we have to speak of game of the generation, I must say, it's too early because there's still games like Fallout 4 and Uncharted 4 coming, and considering the expectations of Fallout 4, that's a serious contender for Splatoon to even touch. We all have our taste, I understand this, but at times, I feel that a game must be looked at objectively before expressing an opinion when it comes to game of the year.
