It could be anything really. Demon's Souls 2, new Crash Bandicoot, new Jak & Daxter, Uncharted 4 (yes it has been announced already, but this wouldn't be the first time magazines try make the announcement for a new game). It's so vague and magazines like to spout off hyperbole, so keep your hype in check.
I find it highly unlikely for it to be anything related to Shenmue.