
In an interview with Crave Online, director Marc Webb had this to say about the proposed fourth film:
"Well, I think this was conceived of as a trilogy so there was a defined architecture to the story we were telling and we had sort of a rough outline of what was going to happen. I think [for] the fourth movie, what we've discovered is there are so many ancillary characters, that have enormous, cinematic potential that there may be other ways to exploit those characters, in a way that is exciting and fun and worthwhile. It might not just be a Spider-Man movie."
What could Webb be hinting at? A merge of the Marvel and Sony universes? Clones? The Sinister Six?
The Amazing Spider-Man 2 is out next summer, with The Amazing Spider-Man 3 and The Amazing Spider-Man 4 due for release on June 10th, 2016 and May 4th, 2018.