Yeah, at this point, they went too far with the teasing and too obvious for it not to be a teasing about Shenmue.
A few days ago, I could see all this being a big misunderstanding and coincidences. Now, I cannot imagine anything else than an annoucement about Shenmue. Even a new game developed by Yu Suzuki not being Shenmue seems highly improbable to me at this point. With the interview they released, the only 2 games that Yu Suzuki made that he talks clearly about is Shenmue and Viruta Fighter (which was the base for Shenmue). C'mon, when he speaks about the very old time when 3D didn't exist he didn't say names like Hang-On, Space Arrier, After Burner, Out Run or his experience on Boxing Champion, his first game ever. Even when talking about 3D he could've talked about Viruta Racing which was his first 3D game.
The chunk of the interview they kept is very, VERY, Shenmue-oriented.
At this point, I really can't believe that all of this is a misunderstanding or a clumsiness from their part. I am very confident that they will announce a new Shenmue game, and that game is probably Shenmue 4.