Metal Gear Rising Teaser

Its not a MGS game, and its not even being developed by Konami or directed by Hideo Kojima, so why even refer to it as a Metal Gear game? Cant we just call it "Raidens Revenge" or "Slicey Swords!" or something? I thought Bayonetta was a pretty spectacular game, so Im optimistic that developer Platinum Games can do something special with the concept (cyborg-ninja goes apeshit), and I will probably play through it as an avid Metal Gear fan, but part of me feels like this game should have been left for dead when Kojima decided he wasnt happy with the development and would either kill the project or outsource it. And yes, this is a real trailer, not some fake live action fan made nonsense - which is what it looks like.