Found this rumor about a Tron 3D movie in 2011, in John Frost’s shared RSS items, from Film School Rejects by way of the TAG Blog:
… thanks to a spy over at AICN, it appears that we have a little more information as to when this TRON film will be hitting theaters. According to the report, not only is Disney looking at a 2011 release, but it is also looking to continue its foray into 3D with the title …
Broke Hoedown 
I heard, though there’s been talk of a Tron sequel for years now, since before the release of the game. I’m not putting much credence in that report, though, simply because it mentions a “Cars 2” and we all know how Pixar feels about sequels…
-Dan!