Complex sentence: Like the Joker, this Red Hood was disfigured after falling into a chemical vat at the Ace Chemical Plant but he was already a superhero and was actively dropped in by Owlman.
Split into simpler sentences: Like the Joker, this Red Hood was disfigured after falling into a chemical vat at the Ace Chemical Plant. In his case, he was already a superhero and was actively dropped in by Owlman.