Yeah I don't care what anyone says, this is totally an Alternate Universe (AU, get it). Wolverine and Invisible Woman from this alternate world travel back in time to our world to kill Hank Pym before he creates Ultron, and that's how it crosses over into our world (which is why we see Peter Parker Spider-Man and the Superior Spider-Man involved in it).
Also, "It was an age of heroes, an age where man and mutant set their differences aside." I'm pretty sure it has to last longer than six issues to be considered "an age." Otherwise its just called "a few issues." Marvel, you have to give us something before you destroy it for it to count.