I've been a casual Megaman fan at best, and haven't played every game, and haven't followed the series since its inception. The only games in the entire series I've finished are Megaman 1, and 2, X, X8, and ZX. That's a random mix, I know, but I generally enjoy these games. I also bought Megaman 9, and 10, but haven't got around to beating them.
This looks like a cool idea, but like others have said, I am not a fan of 2.5D for games like this. I like the Rayman Origins approach to making a side scroller-- keep it sprite based, even if there are some 3D effects. This extends to the DKCR games, Samus Returns, Kirby, and really, any game that should be 2D, but they feel the need to throw in some polygons. This doesn't make them bad, but it will be indicative of a period a few years out. It must be easier at this point to animate basic 3D models than to draw out frames for a sprite based game.
As long as it plays well, I don't care how it looks, at the end of the day. I just prefer true 2D visuals for games like this.