No RSX, Itagaki's known to abhor QTE's, if there's one thing you won't see in his games it's that.
None of it was gameplay of the finished product, as I understand it the trailer was a demo of the engine they've got intended for the game and the visuals something along the lines of what they are gunning for. In essence most of what was shown was what they want to put in the game and what's possible with the engine. Most of it looked quite possible to put into gameplay to me without resorting to any tricks.
I think that for me, I'm hoping the Itagaki that made Ninja gaiden Black (the best action game of all time, no contest) is what we get here and not the one that made 2 (although the Tecmo pay issue probably had a bad effect on production) or any of the DOAXBV games