If there's a superhero then there needed to be a villian to balance things out. And who better to fill that role then Joe himself. He then made his wish that he was the multi-billionaire, Lex Luthor. Owner of Luthor Corp. He wasn't going to let Supergirl be his enemy though. No, Supergirl would be in love with him. She would do anything for him and he would have the maid of steel in his pants.
Then Joe's hair fell out and his t-shirt and jeans turned into an armani suit. He was in a condo in downtown metropolis and there lying on his bed in white bra and panties with the supergirl shield over her right nipple. She motioned for him to come to her and Joe was only to happy to comply.