Heroes
Spider-Man vs Batman (Who Debuted First)
Batman (May, 1939)
Swamp Thing vs Man Thing (Who Debuted First)
Man Thing (May, 1971) (He beat Swamp Thing by only 2 months)
Thanos vs Darkseid (Who Debuted First)
Darkseid (November, 1970)
Crossbones vs Bane (Who Debuted First)
Crossbones (October, 1989)
Avengers vs Justice League (Who Debuted First)
Justice League (March, 1960)
Hulk vs Superman (Who Debuted First)
Superman (June, 1938)
Wasp vs Bumblebee (Who Debuted First)
Wasp (June, 1963)
Loki vs Joker (Who Debuted First)
Joker (April, 1940)
Enchantress (Marvel) vs Enchantress (DC) (Who Debuted First)
Enchantress (Marvel) (April, 1964)
The other one was April, 1966
Young Avengers vs Young Justice (Who Debuted First)
Young Justice (June, 1998)
Thor vs Shazam (Who Debuted First)
Shazam (1939)
Deadpool vs Azreal (Who Debuted First)
Deadpool (February, 1991)
Baron Zemo vs Deathstroke (Who Debuted First)
Baron Zemo (July, 1964)
Ultron vs Metallo (Who Debuted First)
Metallo (May, 1959)
Sinister Six vs Suicide Squad (Who Debuted First)
Suicide Squad (September, 1959)
Black Widow vs Hawkgirl (Who Debuted First)
Hawkgirl (January, 1940)
Black Panther vs Martian Manhunter (Who Debuted First)
Martian Manhunter (November, 1955)
Abomination vs Doomsday (Who Debuted First)
Abomination (April, 1967)
Ares (Marvel) vs Ares (DC) (Who Debuted First)
Ares (DC) (October, 1941)
Pet Avengers vs Legion of Super Pets (Who Debuted First)
Legion of Super Pets (1962)
Moon Knight vs Red Hood (Jason Todd) (Who Debuted First)
Moon Knight (August, 1975)
Star Lord vs Cyborg (Who Debuted First)
Star Lord (January, 1976)
Dr.Doom vs Brainiac (Who Debuted First)
Brainiac (July, 1958)
Kraven vs Gorilla Grodd (Who Debuted First)
Gorilla Grodd (May, 1959)
X-Men vs Teen Titans (Who Debuted First)
X-Men (September, 1963)