Pardon my philosopher's thinking, but I suppose we ought (as with all things) consider a few lenses:
a. We're all antsy for S4, and the anime (though good) is stirring us up. It also helps that S3 broke what's (for many if not most of us) a nearly decades long fast. Ryo may begin to hope in supernatural forces, but we ourselves needn't hope in mere companies. Moreover, silence of certain Dojo members doesn't prove anything.
b. Video game media culture is exaggerative if not nightmarish right now. While nostalgia content is being pushed to an extreme (maybe this helps the case of S4 coming to be), some also troll for that purpose (Blue Box comes to mind). Some of you note that trolling to that degree is a company killer-- perhaps, but it's not above a company to risk building up hype. Admittedly, their tactic is interesting: it could go either way.
c. 110 doesn't seem to me to be trolling, but they could be obliquely trolling to build hype: a YS connection, but indeed some fantasy game YS wants to be put out. So too, it could be something non-Shenmue coming out in even as late as, say, 2024-5, and the hype is being built. Game, timeline, and other factors could let us down.
This could indeed be possible. I'll keep my eyes on this, esp. after the anime concludes, but let's not pretend this is still 2003. S3 came out, but one can still be duped. I'm biting my lip and hoping to be wrong.