Black Panther has battled the Ku Klux Klan. Batman has teamed up with a cow called Bat-Cow. Wolverine was nearly called The Badger. Iron Man's armor used to have roller-skates. Robin is the only person in the world who can do a quadruple somersault. Captain America used to have an airbag built into his outfit. Aquaman can walk on water. Apocalypse was supposed to be Cyclops' brother. Barack Obama made Deadpool an Avenger. The Flash popularized the "alternative worlds" concept in comics. Drax can play the saxophone. Green Arrow has a chimney arrow. There were three Hulk characters before Bruce Banner became the Hulk. Green Lantern has teamed up with Huckleberry Hound. Peter Parker's name is misspelt in the first Spider-Man comic. Vision has saved the world at least 37 times. Thor nearly had an off-Broadway play in the 1970s.