Ok, so I went to Tron Night few hours ago, and can give you detailed description of the scenes.
First, the movie looks really cool. The music is just perfect for the film, and the CGI and sound are top notch.
The scenes where from the first half of the movie
SPOILERS (will give brief description).
First scene: Sam and the other guy from the trailer talking in Sam’s house (wherehouse?). Told him that he get the page from he’s father.
Sam goes there, and as in the trailer get ‘teleported’ in The Grid (Tron’s world).
Second scene: Sam is captured and send for fighting in the games. He’s striped by four hot girls, and given the new ‘Tron’ costume. Then he’s given a disk.
Third scene: He fights with a dude in a ‘disc fight’. He wins.
Fourth scene: The one now online: with Olivia Wilde in the cool car but extended: She takes him to he’s father. There’s hugs and stuff.
We also have a quick montage of scenes at the end.
END SPOILERS
I really liked that Olivia’s character act like a program, not as some badass girl.