Because it was about due time. =D
Everyone, say hello to John! He's Cable and Domino's son from a war-torn future that only big guns, multiple pouches and gritted teeth could contain! Some of you might know him from Wes and Ryan's timeline, were he made a brief appearance to drink all their beer and watch all their reality TV.
He's from Earth-4935, a timeline I didn't know had a number; the quickest explanation is that he's from Cable's continued future: Apocalypse was defeated and set to rebirth again, Stryfe is Cable's angry clone leading an angry army and Cable leads the Askani, a religious order created by Rachel Summers in order to defeat Apocalypse. Is it confusing? Yes. Does his family tree make no sense? Yes. Is he bringing a small arsenal and the techno-organic virus into the game? Yes.
If you have the time, please read up on him
here and learn a little more about the convoluted history they gave Cable well after the character had been created
here. In the mighty Marvel fashion, I'll do my own write-up to flesh out John's world a little later, but right now, there's a messianic soldier landing in the foyer of the Mansion. If you have scene ideas, any questions about how Rachel Summers knew about Cable before he was born when she had met him in an alternate future that wasn't her original timeline, curious about anything else? Just ask.
Muchas, guys.