With three acclaimed games now under its belt, Insomniac's Spider-Man universe is well under way, and the door is still wide open for future sequels and spin-offs. During the course of Marvel's Spider-Man 2's main story, side content, and post-credits scenes, fans are given plenty of teases about where the franchise could go next, and according to the unfortunate horde of leaked documents from the end of last year, a good few plans are already in place.