From what I've read previously in the Sony leaks, Activision has to give up large sums of revenue to both Sony and Disney/Marvel whenever they make a Spider-Man video game, which is one of the main reasons why the quality has been severely dropping as there are less incentive to invest so much.
Additionally, Sony partially published some of the older movie-tie in games in other countries. I'm guessing Sony would much rather have some third party make those movie tie-in's because they don't have to use any of their internal resources to build a game and let their first party studios make games that they hold 100% IP rights to.
That being said, given the recent team-up with Marvel/Disney for the upcoming movies, its possible that Sony might take a more hands-on approach with the games through deals. We've seen Disney work with EA for multiplatform Star Wars games and have exclusive deals with Sony for marketing but given its Spider-Man and Sony's hands in the property, anything can happen..
Personally, I would LOVE the idea of Sucker Punch working on a Spider-Man game, or rather ANY talented studio do the property justice like what happened with Rocksteady's Batman games. However, the creative freedom that Sucker Punch get for working on their own IP's is some times a factor that relatively big developers don't want to let go off, which is usually something that must be sacrificed while working on a license.
Best wishes.