When Iron Man, Spider-Man, the Fantastic Four, and other heroes are kidnapped and brainwashed by Annihilus during an invasion from the Negative Zone, their children must step up and become heroes themselves. Morgan Stark, daughter of Tony Stark and Pepper Potts-Stark; Mayday Parker, daughter of Peter Parker and Mary Jane Watson-Parker; Franklin and Valeria Richards, son and daughter of Reed Richards and Susan Storm-Richards; Jo-Venn and N'Kalla, adopted son and daughter of Ben Grimm and Alicia Masters-Grimm, team up to rescue their parents and save Earth. Along the way, rivalries turn into friendships as the next generation learns that living up to their parents' legacy means having the courage to forge a legacy of their own.
Based on Batman & Superman: Battle of the Super Sons.
