[Western Crossover] I Made the Superheroes Lose It

Lex Luthor has made another Doomsday. A more dangerous, terrifying Doomsday that can be carried around. Batman and Superman break into Luthor Tower. There's no monster in the lab, just a little girl with curly hair. And Luthor stands nearby, looking grim as he holds a bowl of nutritious baby food. "Luthor, did you have another child with Superman?!" "No! I created a new Doomsday!" "Where's Doomsday?" "In your arms." 2. When Nina wakes up, the game is giving her a recap of the story so far. System: [You are peerlessly beautiful, can revive infinitely, are impervious to blades and bullets, and can breathe fire and spit ice] [You can also evolve your superpowers by getting hurt] [One of your fathers is a superhero. He's powerful, kind, and admired by everyone] [Your other father is a wealthy supervillain. He's richer than anyone and unbelievably smart] Nina: Awesome! The perfect start! [You are a humanoid weapon created by your father] [Your purpose in life is to destroy your other father] [Your codename is "Doomsday"] Nina: Wait, who am I? Am I the Doomsday I'm thinking of? [Yes. Good luck] [Now issuing the first mission] [Within 10 seconds, psychologically devastate both your fathers with a single sentence. The shorter, the better] As Superman and Luthor argue, Nina's gaze passes over her two fathers and lands right on the outsider in the room: the black-caped hero with cat ears. "Daddy?" Superman: !!! Luthor: !!! [CP mini-scene] "Every child is their father's Doomsday." Batman comforts his friend like a man who's been through it. "I have four." "B, I really appreciate you sharing your parenting experience... but that doesn't mean I'll let your son kiss my daughter!" Reading notes: 1. The female lead is half-Kryptonian and has all of Doomsday's abilities, including evolving by getting hurt, but her other half's genes aren't Luthor's. 2. The toddler stage won't last long. There'll be a time skip, and the romance only begins once she's an adult. 3. Pairing: Jason. This story isn't very kind to the Joker, so Joker fans beware. Theme: Raising children is important.