This is an idea I'm putting up for sale. A Batman AU based on the old one starring Michael Keaton (Love that guy.)
By day Adrien Agreste is the heir to the Agreste fashion industry. After the murder of his parents at a young age, he was brought up by his cheese loving butler Plagg. By day he's just a calm and handsome young millionaire. But in the night he's Chat Noir, a playful and strong hero who defends Paris from criminals.
One night at a charity event he instantly falls for Marinette Dupain-Cheng, a beautiful and feisty photographer who takes pictures of strange and unusual things that happen in Paris for the the newspaper. He charms her as Adrien and Chat leading to her dating Agreste and becoming suspicious about Chat Noir.
Paris is soon in danger of a new villain. Nathaniel Krutzberg, is a pyschotic criminal obsessed with art and beauty. He is the second in command of Paris's number one crime boss Kim. Until Kim finds out he was having an affair with his girlfriend the vain and selfish Chloe Bourgeois. He sets up Nathaniel to be arrested in a heist that leads him to falling into a vat of chemicals called Akuma. He survives but his face is disfigured, his skin turns purple, and he becomes more insane than before.
He renames himself The Evillustrator, kills Kim, takes over his mob, and devotes his time to creating his own version of art by disfiguring people or killing them in artistic ways.
Chat tries to catch him but every time he gets close, the Evillustrator avades him and leaves taunting him. To make matters worse, Adrien tries to commit to his relationship with Marinette but his absences to his hero duties are driving her away and she considers dumping him.
Days pass, Evillustrator gets bored with Chloe and mauls her face. Ashamed of her hideous new face Chloe wears a mask to hide it soon she can't take looking the way she is so she commits suicide by jumping out a window. He decides to find a new beauty to obsses over. While looking in the newspaper he sees Marinette's picture and decides she's the unlucky girl.
If you want to use this idea please let me know.