A Spider-Verse game would have been so good
Everybody gets to customize not just their Spider-Man, but also the city around them, choosing things like architectural design and fashion for NPCs
And then you can travel from one player's world to another and see all the differences you chose
Maybe even set it up so choices you make during the game's campaign determine what options are available in your city during multiplayer, maybe a villain's not around at all for one player and that same villain was elected mayor for another