Microsoft has filed trademarks for what appear to be two new games. Both Tentacles: Enter the Mind and Ori and the Blind Forest were registered, bearing the "game software" classification.
While these both could be big reveals the company is saving for E3, there's a good chance they'll be popping up even sooner, as Microsoft has promised to showcase some new indie games at gamescom later this month.
Either way, more content for Xbox One is never a bad thing, especially if it's game software the masses actually want to play. I just hope they aren't a couple of half-baked Kinect games.