Here is what Garrett Headland, star of Tron Legacy just said:
"Ever since Legacy they’ve been conjuring up where this world could go and what the future holds for Tron, and they were finessing a story and just making sure the next one has the right story. As far as I know everyone is in a mutual feeling that this one will blow Legacy out of the water. New characters, new vehicles, a whole new idea in the grand scheme of things. But who knows? Nobody has said it’s done for sure. And maybe 30 years from now I’ll be in Jeff [Bridges]’ position because the gap between 1982 and 2009. Any time between now and then it could happen."