You probably need to make a chapter in 40 Monsters, 1 Hero (Rampage x Ultraman Reader) where Scum Labs' dirty secrets are revealed on the news. Channel 3 news reporter Mike Molloy exposes that the real monsters are Scum Labs themselves, and that the giant creatures were originally people—until they drank the Scum Soda.
Scum Labs tried to contain the mutated humans in cryotubes but failed. The creatures, now misunderstood monsters, want to escape from Scum Labs, each still retaining aspects of their human personalities.
For example, Ramsey the Ram, who is destroying chocolate factories, was once a chocoholic candyman. Nick the Demon, Kyle the Cyclops, and Bart the Bat—who now sabotage concerts—were once a rock band trio consisting of an electric guitarist, a bassist, and a drummer. Eyegore and Edwin, who resemble aliens, were actually just science fiction fans mutated by Scum Soda to look extraterrestrial (despite not being from another planet). Leon the Lion, who is destroying casinos, was formerly a casino owner. And Gilman was a swimmer who was turned into a giant fish monster.