Infamous. I don't know why the series just disappeared after Infamous Second Son, I feel like we could've gotten way more in that universe. While they're at it they should port Infamous 1 & 2 to modern consoles...
Came to say inFamous, but specifically picking up after the evil ending in 2. The way that frames it could allow for character customization, and maybe even getting to choose your powerset.
It could even have multiplayer elements if that's where they wanted to go with it. Not sure how well PvP would work out, but co-op missions could be fun. But, it could work just fine without any of that
I would love to have them on PC. Honestly why Sony doesn't port all their old catalog (Sly Cooper, Jak & Daxter etc.) is beyond me. That would get them so much money.