Tobey Maguire, Kirsten Dunst and Sam Raimi continued to tease fans about the possibility of a fourth “Spider-Man” movie at a press conference in Tokyo following last night’s world premiere of “Spider-Man 3.” (Japanese audiences will now get the film on May 1, three days earlier than their U.S. counteparts). Dunst, who earlier predicted in an interview with Enterainment Weekly a film without her, Maguire and Raimi (who is flirting with directing “The Hobbit”) would flop, referred to “S3” as the “final” film in the series, then quickly corrected herself. Or is this all a negotiating tactic? Jake Gylenhaal, stay in touch with your agent.