In the 2005 film Constantine, John Constantine (Keanu Reeves) is a weary and cynical chain-smoker who, as in the TV series, is able to sense and communicate with half-demons and half-angels on Earth. He exorcises demons back to hell to earn favor with heaven and avoid eternal damnation for a suicide attempt in his youth.

In Batman, Red Hood is the alter ego of Jason Todd, who takes controls of multiple gangs in Gotham and cleanse the city of violent crime in his own way. He comes to blows against Batman and other superheroes who believe he goes too far, but he mounts a PR campaign to appeal to the public, which includes adopting a more traditional superhero costume.

In Aquaman, Mera (Amber Heard) is a warrior and daughter of King Nereus and Queen Atlanna. She possesses hydrokinetic and telepathic powers that allow her to control her environment and communicate with Atlanteans.

In Arrow, Oliver Queen (Stephen Amell) is Green Arrow, a billionaire playboy who dons a costume and fights crime. Sounds a lot like another guy we know. No surprise that his weapon of choice is the bow and arrow.

Professor Zoom AKA Reverse-Flash is the archenemy of The Flash and DC’s Legends of Tomorrow. The Reverse-Flash was obsessed with The Flash from the 21st-century so, he recreated Barry Allen’s accident to get his same powers. He can travel through time, causing calamity and long-term trauma for Barry Allen.

As a 13 year old girl, Kara Zor-El (Melissa Benoist) was given an intergalactic babysitting job by her parents, who sent her with the infant Kal-El from the doomed planet Krypton to Earth. During the journey, a mishap caused her to enter the Phantom Zone, where time stops, for 13 years. By the time she reached Earth, Kal-El had become a grown Superman, while Kara Zor-El was just learning to embrace her powers as Supergirl.