I'm hella late on this, but they finally anounced that Tron Legacy will hit theatres on December 17, 2010. So we got a bit of a wait..
Hopefully this will either tide you over or leave you wanting more.
I'm not sure what I'm more excited for; the movie or the soundtrack which will be done by one of my favorite groups, Daft Punk.
Here is the storyline according to a Disney press release:
Sam Flynn (Garrett Hedlund), the tech-savvy 27-year-old son of Kevin Flynn (Jeff Bridges), looks into his father’s disappearance and finds himself pulled into the same world of fierce programs and gladiatorial games where his father has been living for 25 years. Along with Kevin’s loyal confidante (Olivia Wilde), father and son embark on a life-and-death journey across a visually-stunning cyber universe that has become far more advanced and exceedingly dangerous.