Dr. Erik Selvig: After his involvement in the invasion of Manhattan, Selvig has seen enough action to last a lifetime. But his experience with otherworldly energy sources becomes invaluable when Dark Energy begins to affect Earth.

Dark Elf: The homeworld of the Dark Elves, Svartalfheim was the source of Dark Energy, a precious commodity in Asgard. Only a handful of Dark Elves are left, but their gravity weapons still make them a deadly threat.