Usually when we're in a year with a new Halo game, that would take the top spot in the "Most anticipated" list from me.
But after playing the beta, after 4 being a bit of a let down, and after the disappointing Master Chief Collection, my faith in 343 has been shaken too much to let myself really hope for much from the next Halo. I'll still play it, I'll probably even like the story/co-op part of the game. But I don't want to hope for it, if you take my meaning.
So, with my old favorite in the doghouse, I move on to the tried and true Dark Knight. I'm hoping Arkham Knight will be great. All it has to do is match the quality of City or even Asylum and it'll be great. Even if it's just as good as the last Rocksteady Arkham game that will be enough. And with the new Batmobile aspect, I'm hoping it'll be even better than City.
So that's my pick for #1 game of 2015. Although that new Sid Meier's Starships game that just got announced looked really good too, so it has the potential to take me by surprise. :)