With Fear Itself over, Marvel has just announced the next big event, starting in April 2012 with a prelude issue in March. It will be a 12 issue biweekly series featuring the Avengers vs. X-Men. The series will be written by Marvel’s “Architects” Brian Michael Bendis, Jason Aaron, Ed Brubaker, Jonathan Hickman, and Matt Fraction.

Read an exceprt from the announcement including a spoiler detailing why the Avengers and the X-Men are fighting.

Kicking off in a special “zero issue” prologue in March written by Bendis and Aaron, Avengers vs. X-Men begins the next month with an extinction-level event barreling its way toward Earth, namely the cosmic entity of death and rebirth known as the Phoenix Force. It’s looking for a new host who will possess all of its power, which may or may not be the mutant teenager Hope Summers.
Cyclops, Wolverine, Magneto and the other X-Men want to protect her and prepare her if she’s to be the new Phoenix. Captain America, Iron Man, Spider-Man and their fellow Avengers want her handed over to them so they can figure out what to do with her and keep the world safe from a potentially fiery fate.