Disney have released the teaser for Tron Legacy as shown at the San Diego Comic-Con 2009.  Note that this is basically a higher quality version of the test footage screened at the 2008 Comic-Con, with a few nifty little additions towards the end.  Awesome:

View additional concept artist images that were shown at the Tron Legacy San Diego Comic-Con panel here.

Tron Legacy will be released sometime in 2011.

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