I'm surprised that basically no one has called out how much this game looks like MGR: Revengeance 2. It even features a massive, Zandatsu-like parry-into-slicing move, FFS. Had you shown me the first 75% of that trailer without showing me the title, I would've 100% thought this to be a spiritual successor to Revengeance.
Now, don't get me wrong: Revengeance and NG(2) are two of my favorite games of all time, and I've wanted proper sequels to them for ages, so this should theoretically be my dream game. But I would much rather have a proper Ryu Hayabusa sequel or a full Revengeance 2, rather than this Franken-game.
I'll still be there day one, of course. I'm just sad it isn't a "real" Ninja Gaiden 4 — that twink can do one.