User blog comment:ZSomji16/The Flash (Season 4), Arrow (Season 6), Legends (Season 3), and Supergirl (Season 3) Villains and Big bads/@comment-7890302-20170327022235

Supergirl: Mongul II, who wants revenge on Superman for his fathers death by destroying everything about Supergiorl.

Flash: Neron, a devil interested in Barry and wants to turn the fastest man alive into his servant.

Arrow: Richard Dragon, the worlds greatest martial artist and criminal mastermind who is tired of the heroes of this world, and wants to destroy the greatest of them all, the green arrow.

Legends: The Brain, who is trying to discover a way to go back in time so he can stop his first defeat and become a god like he intended too.