@NewComicGuy: just an alternate future story, not an event
@IronAngelX: Age of Ultron? Just a guess.
End of last year Marvel teased Ultron with a teaser showing a binary code and "March 2013 A.U." where the translated binary code said "Age Of Ultron" (see below). Maybe the title is meant to be a pun on the end of the world in 2012 according to the Mayan Calendar (or the miscalculated end of it). After the end/apocalypse in 2012 comes the Age of Ultron in 2013.
Hoping they include Vision in this event seeing as how I think they forgot he was in the #0 issue of AvX
I guarantee you Vision is Ultron. Like a year or so ago in one of the Avengers books they found Ultron code. Then Vision miraculously fixed himself after Tony couldn't figure out how to do it.