The teaser does say "remake" at the end. I have a bit of a horrible feeling that Nomura is going to update it for the worse though. All of his projects he's been involved with since Advent Children has the same combat of people super jumping around everywhere like rabbits. Honestly I'm not a fan of that style, so I really hope he tones it down for this.
Also I'm nitpicking here, but I was expecting Barrett's arm gun to be more birthday cake like in appearance, like his first weapon is originally. I almost didn't even realise it was him. I guess they've gotta make it look cool though...