Felton @ ComicCon 2010

Also, WB reports that there was footage shown at this years CC will not be shown anywhere else.
But luckily, there are a few reports on what was seen.
Once the trailer ended, a scene with the Big Three begins. We find our heroes in a diner, contemplating next steps after the fall of Hogwarts, when two assassins try to, well, assassinate them using magic wands. Hermione takes refuge behind a table and returns wand fire and then we cut to a new scene with Voldemort.

Potter's nemesis sits at the head of a long table, joined by Snape, who then instructs Voldemort about Potter's whereabouts. It is here that Voldemort says the chilling line: "We all agree that I must be the one to kill Harry Potter."

Ron and Harry get into a shoving match and then its quick shots of those who have died protecting Harry, a shot with several Harry Potters standing around, as well as a glimpse of the forcefield surrounding Hogwarts burning away.

The footage also gave us a look at Bill Nighy in the role of Rufus Scrimgeour, the new Minister of Magic.

The last shot was a very dramatic, very slow-mo stand-off between Harry and Voldemort, aiming their wands at each other as their magics collide in the middle. Harry, knees inching toward the ground, looks like he is about to meet his match.
**This by IGN