In Disney’s The Lion Guard, a tv show midquel to The Lion King 2, the writers of the show found a way to bring the main antagonist of Lion King 1, Scar, back to the screen despite the fact that he died. How they did it was by having a group of the show’s antagonists, hyenas and a cobra, bring Scar to their aid by summoning his spirit to a volcano full of lava and fire, using a stick that they stole from Rafiki’s apprentice.
Perhaps Hasbro can do a similar thing with the Storm King someday, you know, by having him come back as a spirit.
It would be a great way to develop the character more. After all, there have been other villains who die but then come back as ghosts, a remarkable example being Captain Salazar in Pirates of the Caribbean: Dead Men Tell No Tales.