The official storyline contradicts the events in Ground Zeroes.
So you think you know Metal Gear, eh? Well if you haven’t been habitually checking the Metal Gear Solid V: The Phantom Pain’s official website, then you’re already out of date when it comes to “official” news. There’s now a story blurb (a short summary) of the stories introduction, which I found to be rather contradictory.
You can read the the entire blurb here but the one thing that caught our eye was this statement. “That first step will lead to a path of vengeance against the very Cipher that slaughtered so many of Snake’s men, and to a battle that will embroil the whole world.” This is rather confusing since Cipher [or Major Zero] was not the one who slaughtered Big Boss’s men in Ground Zeroes. It was actually Skullface who orchestrated the entire downfall of Mother base.
It seems that Konami is purposely playing with players who have played through Ground Zeroes, creating a sense of confusion among players who follow the game’s storyline very closely. One thing is for sure, all is not what it seems with Metal Gear Solid 5. Either way, we will keep you updated.