Marvel has announced that Avengers Vs. X-Men, a twelve issue miniseries, will launch in April.  Both art and story will be done by teams of creators, presumably to facilitate the twice-monthly release schedule that’s planned.  The series will be written by Brian Michael Bendis, Jason Aaron, Jonathan Hickman, Ed Brubaker and Matt Fraction. Art will be by John Romita Jr., Olivier Coipel, and Adam Kubert.   
The Avengers Vs. X-Men storyline is based on the return of the Phoenix Force to Earth, and its need for a new host for its power.  A decision tied to the Phoenix’s return will pit the Avengers against the X-Men, with implications for the Marvel Universe.
Avengers Vs. X-Men will be released digitally on the same day as print.  The print release will include a code for a free digital copy.