I am tied up with something but have a thought… by mistake an intended attack on Clark Kent misses or a bullet ricochets and it appears to be an assassination attempt on a politician (maybe incorporate real history here). Under increasing scrutiny, the CIA is forced to wind down their assassination program, at least as far as Clark Kent is concerned. To his handlers, shooter insists he struck Kent but that’s impossible, the politician was hit and nobody caught the hole in Clarks clothing. Shooter and ends up in an insane asylum… where he is subjected to a procedure that transforms him into a nemesis with special abilities, who only has it out for Clark Kent, not (knowingly) for Superman.