The Defenders

The Defenders was a comic book published by Marvel Comics Group. Grant had a poster for The Defenders in his childhood bedroom, which depicted one of the issues of the comic, with the tag line "Valkyrie's Vengeance!". (TV: The Return of Doctor Mysterio)

Behind the scenes
The issue depicted on Grant's wall is. Some of the characters seen, but not identified, are Spider-Man, Doctor Strange and Valkyrie.