Still waiting on a proper Playstation and Xbox character. that would be the ultimate final boundary.
Microsoft came the closest since they allowed Banjo and Steve, but at the same time i feel they are not a true "mr xbox". banjo is seen as a lost nintendo character and steve is still kind of a multiplat guy
with sony supposedly porting their games more, i do wonder if they will be open to a cross over, like Rachet, or Jack and Daxter or even death stranding.