The Avengers: Earth's Mightiest Heroes Wiki
Surtur Proposal One

Muspelheim is the realm of the Fire Demons and lead by Surtur.

When Loki took over all of the realms except for Midgard, it is unknown if Muspelheim was conquered too or was left alone by Loki's forces.

When Wonder Man destroyed the last Norn Stone, he and the Enchantress were teleported to Muspelheim.

It became Amora the Enchantress' new home when she became the Demon Queen.