I work for a Market Research company and we recieved new trailers for "SM3" never before seen at comic-con or in theaters.
In the first part it confirmed that Flint Marko is indeed Uncle Ben's killer. Peter and Aunt May are called into the precinct and Peter gets a glimpse of his picture. Peter storms out of the precinct pissed off screaming asking what appears to be Captain Stacy, "He's still out there and you didn't do a thing about it?"
Then the trailer cuts to how Flint escaped, ends up at a radiation plant, and then the animatic was hard to make out but he starts transforming into the Sandman. He looks at his fingers and they start perspiring into dusks of sand, before reappearing in front of his eyes.
Next it cut to Peter and MJ on a web cuddled up close and making out. Peter is ready to propose to her and things look great, till he starts flirting with Gwen, recieves the new suit and feels top of the world.
Then the trailer cut to Spider-Man Appreciation Day and shots of Spidey swinging around, leaping and jumping tall buildings, and doing his pose by an American flag, but then...
Harry comes up right behind Peter Parker as we saw in the theatrical trailer. His mask is a retractable, collapsable mask, and he shows his face and says, "You knew this day would come..." and flings pumpkin bombs, rockets, and razor bats at him.
Then, the trailer cuts to MJ and how she wonders why Peter and Harry don't get along.
Then, next it showed Spidey in the black suit being followed by Brock. Brock starts teasing him, snapping pictures, Spider-Man then grabs the camera, and smashes it against a wall.
After that it cuts to Brock teasing Peter before Peter grabs him by his shirt collar and pushes him against a wall angrily.
Cuts to MJ wondering what has gotten into Peter and he says, "I don't know but I got to stop it..." and then it shows the infamous Comic-Con fight between Spider-Man and Sandman and he asks him, "Do you remember the name Ben Parker?" and Sandman tells him to, "Stay out of this kid..."
Lastly the infamous Venom shot is revealed and it cuts to "3."
It was amazing guys I'm telling you and it just confirms alot of the stuff that was on the boards.