I don’t know too much about Foolkiller. I know there’s been a few incarnations, but not much material as a whole. This take has vibes of a Deadpool meets Suicide Squad mashup.
“Greg Salinger was just your typical merc for hire–FOOLKILLER–killing those that he deemed to be ‘foolish.’ And for money. But that life is behind him now. Today, he’s a psychiatrist, trying to help others. But now S.H.I.E.L.D. wants him to try to rehabilitate super villains. The catch? If these ‘patients’ don’t make enough progress, they’re dead!”