Looking to use Lex Luthor using his power for sexual gains as I don't feel he gets enough love. I'm up for something as simple as ... someone desperate (can be DC related or a full-on crossover) is willing to use their body for Lex's financial backing.

Or we can go a darker route where he creates a ring that can brainwash whomever looks directly in to it. He can use it on superheroines, supervillainesses, or other fandom characters that he finds attractive. They can either be completely brainwashed or simply be unable to say 'no' until he breaks them free of the magic working in their head if you wanted them to be mouthy/try and resist him.

Open to other sorts of storylines as well, these simply were the first/quickest I was able to come up with.