Well, first Johnathon Hickman told us that SHIELD was actually formed in 2620 BC by the Egyptian Pharoh Imotep. Then we were told by Brian Michael Bendis that the Avengers were actually formed in 1959 by Nick Fury.
Now Marvel is announcing First X-Men
by Christos Gage and Neal Adams that will tell the tale of a pre-Prof. X team of X-Men that was founded by Wolverine. So now, we are to believe that Wolverine was the first X-Man.
It sounds really cheesy to me, but I am a fan of Christos Gage, so I will hold off on deciding about it until I know more.