Interestingly, they hinted at a Tron 2, with some concept drawings already done. It makes you wonder - would they even need live action stars for a sequel?
I already have a silly scene in my head for the next movie. The main characters are walking along and happen to notice what appears to be some sort of boxing match, with a series of judges keeping score. One of the main characters says, "Hmmmph. Another domain name dispute."