Any reasonably intelligent person could have predicted this one. According to Variety, Disney is working on a new Tron game. The game is reportedly a tie-in to the upcoming movie sequel TR2N.
Sadly, that's all the information we have. TR2N is a few years from completion and we can only assume the game will be released simultaneous to the movie. Garrett Hedlund is reportedly the lead in TR2N.
In case you forgot: TRON is a 1982 science fiction flick that stars Bruce Boxleitner set within a world inside a computer. It's notable mainly for its then-groundbreaking computer effects.