If the film does include different variants of Thor ... Volstagg was consumed with rage and claimed the hammer to become War Thor. Volstagg used the hammer to nearly destroy all of Muspelheim ...

While Thor wages war on Jotenheim, Sif sneaks into Asgard and frees Idunn before the group hides away in Niffleheim. We get cameos from the Warriors Three — Volstagg, Fandral, and Hogun ...