If Sony haven't locked anything in, I'd really like MS to come in and say 'look, give us same day release with PS4 and we will contribute' - and I say this as a PS4 only gamer.
I don't think Shenmue fans give a hoot about exclusivity. Xbone fans would be glad to have the option and I don't think it sounds like it would cost MS alot versus the goodwill / PR theyd earn.
I would love this for a few reasons:
1) Selfishly I would love to see this since I only have an XB1. I'll buy on PC, but would love to get on XB1, too (I'd even buy it on PS4 just to show my support, even though I don't have a PS4 - that's how much I want this game to succeed)
2) Shenmue is one of those games I believe that is really magically and deserves to be on as many platforms as possible. More people should have the chance to be exposed to this wonderful story and universe.
3) It'd make for a great story and demonstrate that this industry still has some people in it that actually want to see these types of games happen, even if they're risky and likely to fail financially - and two rival companies working together to make it a reality? Even more special.
I don't think it'll happen, but would love to see it.