Think about it, both came out in 2014. Insomniac is basically Sony 2nd party, they just came back from a nasty deal with anoher publisher. I think the only reason Sunset Overdrive ended up on Xbox is because Insomniac went to Sony with the concept, Sony saw that it was too close to inFamous SS and ditched it, inFamous should've been further along in development as it came out 7 months earlier. Any other time and they probably would've funded it.
Anyway, I do hope that MS is working on SS2 for Scorpio.