Even if we place it outside of (Rockman ZERO) continuinity; as a strange alternate paralel future of the classic and X-series. It still reveals to us information of the past shared with Rockman ZERO. How do you feel about that information assisting us in our understanding of those series?
It all depends on whther or not CoJ decides that it shares continuity with the mainline games. The info is great, yes, but I'm also wary--I'd hate to accept it as canonical to the mainlines only for CoJ to go "lolwhut?"
But as long as we're assuming that RMO will be a mainline game, or in the same continuity--I'm hoping that the Megaman, Protoman, and Roll seen in the trailer are the real deals, and that they're not horribly killed off at any point. Maybe, if the game lets them live, it'll also explain why Mega and X never met (because they're
not the same 'bot).