Black Mantis
Member
I doubt Insomniac's deal with MS is different to Capcom's and Crytek's. Publishing rights always revert back to the copyright owner after a time, anyway.
It's already different to Capcom's, as they're a publisher themselves and published the X1 version. It's likely similar to Ryse, but remember that Remedy had to ask for permission from MS to publish AW on Steam, so there's likely a similar caveat with SO too.