Dennis Hallum, known professionally as Dennis Hopeless and Dennis "Hopeless" Hallum, is an American comic book writer from Kansas City, Missouri, who has written for Marvel, Image, Dark Horse, Boom! Studios, Arcana Studio and Oni Press.

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.