I haven't watched either video yet, still waiting for the blu-ray.
But if the Dillinger's are the villains, I'm hoping for the Grid to look like it did in the first movie, but with today's special effects. That will be really cool to see. Man, I can't wait for a third one...And Sticks, I agree. Not only is Quorra amazing to look at, she is also the most interesting character (Take a lesson from Tron, Michael Bay
) I can't wait to see how that further develop these characters in the upcoming movies. As for Bridges, I doubt he will be a character, but will likely cameo. I hope that Lora/Yori are back.
This Tron talk just re-reminded me of Uprising