"Battle of the Atom" is a 10-part comic book crossover storyline published by Marvel Comics that debuted in September and October 2013 and ran through multiple X-Men books.
Cover of Battle of the Atom 1 (September 2013), art by Arthur Adams
All-New X-Men was a comic book series published by Marvel Comics that debuted in November 2012, with the launch of Marvel NOW! The series centers on the five original X-Men, brought from the past to the present to confront their future counterparts. The series replaces Uncanny X-Men vol. 2 as the flagship book of the X-Men franchise.
Cover of All-New X-Men #1 (January 2013). Art by Stuart Immonen & Wade Von Grawbadger
Writer Brian Michael Bendis signing a copy of the book at Midtown Comics