When the Steel Jaw Army invades Metropolis, Earth's heroes and villains must team up to stop the invasion. Together, they must fight off the steel jaw forces. The Super Hero Girls' only chance at destroying Steel Jaw X and his steel jaws is the disintegration ray invented by McTodd Steel.
Read the full plot here. https://dc-super-hero-girls-fanon.fandom.com/wiki/The_Battle_For_Earth