Spider-Man 3 participation for the main cast of film franchise was a done-deal from the beginning, according to Kirsten Dunst (Mary Jane Watson).
Director Sam Raimi and star Tobey Maguire are reportedly still working on the details of the film but nobody is renegotiating, Dunst told About.com. "For more money?" Dunst asked. "No, that hasn't even started yet. We have to get through the publicity tour of the second one first."
Meanwhile, Bruce Campbell offered a spoiler about his role in the upcoming Spider-Man 2. Bruce told a fan at a screening of his Bubba Ho-tep film that his role is ”not just a cameo, he actually defeats Spider-Man, adding in the first film I named him, in the second I defeat him, in the third I will probably play him!"