People are asking why now?, The answer is obvious: Spiderman is by far Insomniac biggest success but they have no part in owning the IP. If Marvel and Sony decided to continue the franchise with another developer Insomniac wouldn't be able to do anything. The profits form Spiderman success are way to big to say 'no' to an offer from Sony guaranteeing you that you will be the developer for the next Spiderman games. That guarantee you financial success and prestige. And besides all of this, there is the familiarity between them of course, so Insomniac knows that if they want to do something new, Sony will back them up, like they do with the rest of 1st party devs.
Sony owns their biggest franchises, and now they can make games from those franchises and make new ones if they want, only just this time, under Sony powerful sponsorship and marketing. It's a win-win scenario and it shouldn't surprise anyone....
Edit: Oh, and by the way, 13'2M units SOLD to consumers in less than a year for Spider-Man...., just simply amazing. The game keeps selling and it's going to be one of the best selling exclusives for any platform in the end. More than 20M with a PS5 version in the future seems like a safe bet.
