First of all he confirmed the movie was indeed titled TRON: Ascension, and it was to be set 2/3rds in the real world. He didn't mention anything about Ed Dillinger Jr. being the antagonist, but did say it would be about a real world invasion from the Grid. He said that TRON 3 is not dead, just cryogenically frozen. He said that Legacy spawned from the Comic Con teaser, so you never know what could happen with events like this screening.
He also shed some light on the light colors and what different shades mean. In terms of orange, the lighter the color, the higher the rank. CLU has gold, Rinzler orange, and the black guard and sentries are all more reddish.
He also let us into something I'm not sure has ever been said to the general public. Sam was originally supposed to have a friend called Sobel who helped him break into ENCOM and then took off once the cops came. He ended up being digitally removed from the final movie, which Joe said he felt bad about for the actor.
Speaking of Joe feeling bad, he said that looking back, it was a mistake to use the face rig to record Jeff's face while he was doing his scenes, because the more complex method would have produced more realistic results in the facial animation for CLU.
When getting Daft Punk for the film, he had a meeting with them at the 101 Cafe in Venice, CA. He had pancakes with Daft Punk. DP apparently also wanted to do a silent score originally, to which they were talked out of, thankfully...
