Despite the cover, this issue has nothing to do with Hordak OR the rest of the Marvel universe.
As it begins, Kobra Khan leads Skeletor to the lower corridors of Snake Mt. and shows him the box containing the Snake Men. Skeletor opens it and forces them to work for him.
They end up capturing Cringer and luring He-Man and Orko to Snake Mt., where a battle takes place. After some arguing, Rio Blast and Snout Spout help stop Skeletor and send the Snake Men running, along with Kobra Khan.