Microsoft has marketing on a major unannounced AAA game.

[Ariakon]

I would put my money on Assassin's Creed, or maybe the next Elder Scrolls...though obviously that wouldn't release this year. So yeah, probably Assassin's Creed, and probably Need for Speed. I mean, what else is realistically going to release anytime soon? 

 

EDIT: Yeah, or Far Cry 5, as Radek just wrote.