10 Essential Marvel Events Not Yet Used In The Movies

10. Fear Itself

A battle for the ages that'll have to exist outside of current MCU continuity (just as likely to find life in an animated feature or standalone alternate universe film), Fear Itself sees the heroes of the Marvel Universe facing the fear and doubt sewn by The Serpent, a powerful Asgardian being seeking revenge on Odin, who imprisoned him.

Brought about when Sin, daughter of the Red Skull, finds the hammer of Skadi and gives rise to the "heralds of the Serpent", the subsequent battle is epic in proportion, with memorable moments including the shattering of Captain America's shield, Odin threatening to destroy Earth simply to annihilate the Serpent, to Iron Man working with the dwarves of Svartalfheim to forge Uru-enhanced weaponry and armour for his allies, as well as repairing Cap's shield with some Uru metal.

Some small elements of this story have been seen in Age of Ultron, when Wanda gives the Avengers visions of their greatest fears and regrets, as well as when Thor visits Svartalfheim to forge a weapon rather than Iron Man. However, it would still make for a good story to see onscreen all on its own.