Ridley (Metroid)
One of Adam's final missions to Samus is to finish off Ridley, whom Adam fears might be more dangerous than the Metroids if left unchecked, and claims Samus is the only one capable of stopping him. However, Samus later discovers his corpse after he is killed, having had his energy drained by the Queen Metroid on the Bottle Ship. His mummified corpse turns up again in "Metroid Fusion" on the BSL station, after having apparently been removed from the Bottle Ship by the Galactic Federation and placed in a sub-zero storage room for further research (potentially into further bioweapon applications). It is later infected by an X Parasite, allowing it to gain the ability to transform into Ridley's likeness, known as . Samus later defeats the Ridley mimic and absorbs its Core-X, regaining her signature Screw Attack. What was left of the cloned Ridley's remains were destroyed along with the X when the BSL station crashed into SR388.
Superman/Wonder Woman
In September 2013, DC revealed that Doomsday and General Zod would be among the first villains introduced into the series. Soule said, "We wanted to go big off the bat. We wanted to stake our claim and make it clear that this was a book that mattered — not just from the idea of the couple at its heart, but also from the events that would be depicted in it and their impact on the DCU as a whole, and in Superman's life and Wonder Woman's life."