How does Superman keep coming back to life?
In the theatrical release of Justice League, Batman concocts a plan to use a chamber in General Zod’s crashed Kryptonian ship and the motherbox, along with some energy from the Flash going fast, to resurrect Superman.
Can Superman resurrect himself?
Superman was able to revive himself during his fight with Doomsday, by using the positive radiation of the sun but he wouldn’t be able to use the same method to revitalize his body since he was buried and kept out of the sunlight.