World with superheroes gets invaded by a hell like world. The superpowered can't win, so they reluctantly plan a bid to escape with the core of their civilization intact. Under the scheming of their supervillains, they gather everyone still alive in one megacity and power up a one-time use teleportation device that's supposed to send them to safety. Though the plan succeeds, the superheroes are horrified to realize that the regular civilians were not brought along with them. A supervillain then reveals that they would have died anyway due to their weak bodies had they attempted the journey.

Back on the home planet as the leftover civilians give in to despair and the invading army approaches with little resistance, a super that didn't join the others comes out in the open. Taking advantage of the situation, they sacrifice themselves and unleash an unstable power of parasitic symbiosis that takes over everyone, enhances their physical bodies way beyond their means and sends them into a raging frenzy. The mindless swarm then rips into the unsuspecting invaders and tears them to pieces, ending the invasion prematurely.

The story is then split in three view points:

• the unreconciled supers give up their hero/villain status (most willingly, others forcefully) and carve through the galaxy a bloody path back home for repentance

• the parasitized remnants slowly regain their minds and must learn to build anew in an altered world, now linked in thoughts and emotions through their shared parasites/symbiotes

• the hell like world must deal with the aftermath of their failed invasion of an undeveloped world on the galactic scene, mostly for comic relief.

PS: If anyone gets an idea out of this and gets rich, I want 10%. Cheers