San Diego Comic-Con officially kicked off this morning with a Hall H panel for DreamWorks Animation's latest film, Megamind, but it was Tron: Legacy, one of the most-anticipated films (and sequels) of the year (it's mine, at least where mainstream films are concerned), that most Comic-Con attendees really wanted to see. From real-time twitter updates, the panel featured eight minutes of footage from the native (as opposed to post-production conversion) 3D film, but those of us on the outside looking in (as in not at Comic-Con this year) did get something today: the second theatrical trailer.

The new trailer repeats a few visuals and plot points from the first trailer, confirming what we already know: Tron: Legacy focuses on Sam Flynn (Garrett Hedlund), the 27-year old son of programmer Kevin Flynn (Jeff Bridges), who mysteriously disappeared more than two decades ago. Flynn's old friend and business partner, Alan Bradley (Bruce Boxleitner), an ENCOM senior executive/consultant, contacts Sam about a message he's received via pager, supposedly from Sam's father. Sam enters Flynn's old arcade and, like his father 28 years earlier, he's digitized and enters Tron's virtual world of perpetual combat games.
The new trailer gives a glimpse at a new scene between a preteen Sam and his father (a de-aged Bridges), more scenes inside Tron's virtual world, including Sam's first meeting with Clu 2.0, a new version of the program Sam's father created three decades ago to infiltrate Tron's virtual world and combat the first film's antagonist, the Master Control Program. The second trailer seems to confirm Clu 2.0 as Tron: Legacy's villain. It also gives a few more lines of dialogue to Sam's romantic interest within the virtual world, Quorra (Olivia Wilde), more combat scenes, and finally, a brief glimpse of a a light-plane.

Tron: Legacy will be presented in Disney Digital 3D and IMAX 3D.

Here, without further delay, is the new trailer:

So what do you think of the new trailer? Does it make you more or less excited to see Tron: Legacy when it hits movie theaters in December? Does it give it away too much information or not enough information for potential moviegoers unfamiliar with the first film? What about the de-aged Jeff Bridges as Clu. 2.0? Convincing or not convincing enough?