Here me out, this could be a strategy for potentially getting a Sunset Overdrive sequel made.
We know Spider-Man was a success. We know Sony has already given the greenlight to Insomniac to make a Spider-Man sequel and potentially even other Marvel games.
We know that Ratchet and Clank on PS4 was super successful.
We also know that the possibility of another R&C game is coming due to the success of the reboot.
What if Sony published SO on PS4 and opened the game up to its own userbase? The game is already on XBO and PC with low sales so I'm not saying it will be guaranteed to sell millions on PS4. But since Sony and Insomniac are already working together on two successful IPs (Spider-Man, Ratchet) would it really be THAT risky for Sony to publish a port of Sunset Overdrive on PS4? It would cost very little as it is just porting the game; they could also use the interest and sales to gauge interest on a sequel.
Considering Insomniac 100% owns the rights to SO, and Microsoft is clearly not interested in pursuing a sequel, this could be an interesting opportunity for Sony.