1Kevin Conroy

Following the 9/11 attacks, Batman Voice actor Kevin Conroy volunteered to cook for police and firefighters. At the behest of another cook, he called out from the kitchen with his iconic Batman line and was greeted by cheers and applause from the emergency service personal.
2. Actor Marlon Wayans was going to play Robin in Batman Returns (1991). He still earns money for his 2-movie deal, despite never actually appearing as Robin.
3. The 1960s Batman with Adam West was known for its morals and lessons, which included the importance of seat belts, homework, eating vegetables, and drinking milk.
4. The Dark Film Noir/Art Deco feel to 'Batman: The Animated Series' was due to the use of black paper with light colors for animation, instead of the industry standard of dark colors on white paper.
5. While promoting his upcoming Watchmen film in 2008, future Batman v Superman: Dawn of Justice director Zack Snyder admitted that he didn’t find Christopher Nolan’s characterization of the Dark Knight that gritty, claiming, “He gets to go to a Tibetan monastery and be trained by ninjas… But he doesn’t, like, get raped in prison. That could happen in my movie. If you want to talk about dark, that’s how that would go.”
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6Flash

The Flash traveled back in time, became a form of pure energy, and was the very bolt of lightning that gave him powers in the first place.
7. There is a book called "Becoming Batman: The Possibility of a Superhero" written by a neuroscientist, which covers in detail how much an ordinary person would need to train and adapt to become Batman.
8. Superman was first conceived as a bald telepathic villain bent on world domination.
9. There is a technique in Muay Thai called the "superman punch" that involves faking a kick to gain power behind the strike
10. Nicolas Cage named his son Kal-el after Superman.
11Superman coins

The Royal Canadian Mint is printing official coins of Superman in Canadian currency
12. Henry Cavill almost wasn't cast as Superman in "Man of Steel" because he was busy playing World of Warcraft.
13. When Batman and Superman were rebooted in 2005 and 2006, Superman Returns made more money globally than Batman Begins.
14. In Superman/Batman #50, it is revealed that Thomas Wayne convinced Jor-El that Earth would be an appropriate place to send his son.
15. Superman once wielded Thor's Hammer in the epic crossover of JLA/Avengers. He accomplished this not because he was a Superman, but because he was "Worthy".
16Superman's ability

In the Superman Comics from 1958, Superman got a new power, the ability to project a mini version of himself that had all of his super powers. Eventually, he became jealous of it and tried to kill it, but it ended up sacrificing itself to save him.
17. Bruce Wayne also known as Batman is part owner of the Daily Planet where Clark Kent A.K.A Superman works. So, Batman pays Supermans salary.
18. According to the comics, Lex Luthor is pissed at Superman because he thinks Superman contributed towards the balding of his head when he was a child.
19. Superman was once bitten by Dracula, but as Superman is powered by the sun, the vampire immediately exploded.
20. George Reeves, the actor who played Superman in the 1950s was weary about his young fans after a boy pulled a pistol on him to test Superman's invulnerability. Reeves convinced the boy to give him the gun by telling him that someone else could be hurt when the bullets bounced off.
21Nicholas Cage

In 1997, Nicolas Cage earned $20 Million to play Superman in Superman Lives, even though he never actually played Superman because the movie got canceled.
22. As a child, Slade Wilson’s father sold him to the mafia to pay off some old debts.
23. DC Comics published an alternative version of the Superman comics where Superman landed in a Ukrainian collective and became a hero of the USSR.
24. There is a DC Comics character named Danny the Street that is a sentient transvestite length of road with the power of teleportation. He travels around the world putting on drag shows for those cast out by society.
25. There is a DC comics supervillain named Snowflame that gets his strength from doing cocaine.

