These are the Dark Knights(plural)
They are basically Evil Batmans, except they commonly also have the powers of other heroes and/or villains.
The first 7 also represent both an evil Justice League, as well as having tragic backstories that prey on Batman's deepest fears.
But what if these 7(I can post links if you guys want the specific ones, or you can browse the list of Dark Knights.) Somehow ended up in Earth-616 of the Marvel universe? How long would it be before they were taken down, and who would do it?
EDIT:Alright decided to put the links for the specific ones I'm talking about, since a lot of the later ones are just weird.
This one is Red Death, basically a fusion of Batman and the Flash,except with evil aging powers too. He stole the powers of the Flash of his world because he thought he wasn't fast enough to catch all of his criminals(which is, technically speaking, a realistic assumption) and also he may have feared growing old would slow him down.
This one is Murder Machine, a fusion of Batman and crazy robot Alfred... Basically this Batman lost his Alfred, tried to make a robot Alfred, but Robo-butler went crazy and dragged Batman into his insanity. This Batman represents his fears of closing himself off from others, and of course, losing Alfred. And also being too dependent on tech.
This is Devastator, a fusion of Batman and Doomsday. Devastator used to be a regular Batman, but when his worlds Superman went crazy, he turned himself into a monster. This guy obviously represents his mistrust of Superman.
This is Merciless. This Batman fought alongside Wonder Woman for 2 years against Ares, the War God. He fell in love with her, and so when they met Ares and he knocked her out, this Batman went psycho, and took an almighty helmet that was intended to make Ares 1000 times stronger. He then killed Ares, his wife, and all of the other Olympians and Amazons, gaining the Olympians powers and the Amazons as a zombie army. This represents his fear of losing Wonder Woman, and something else I forgot. Maybe it was trying to play God.
Then we have Dawnbreaker. This Batman basically got a free Green Lantern Ring. Literal Minutes after his parents died. So he went crazy trying to use the power to kill criminals, and actually "broke" the ring a bit, resulting in it being this all-corrupting darkness. This Batman represents the main ones fear that he will never get over the death of his parents.
This one is the Batman Who Laughs, the original baddie and ringleader of this psychotic bunch. He's basically normal Batman, but he got infected by Jokers insanity after he killed him. EDIT: Holy crap never mind, he turned into a God too. Like, one of the higher beings of all reality God.
Finally we have the Drowned. This Batman(or rather, Batwoman as she comes from a gender-switched universe) was a normal hero, until first her Boyfriend Cat-man died, and then Aqualady and her Atlantean army decided to do some world domination. So Batwoman decided to genetically engineer herself with their superpowers, and killed Aqualady and her Atlanteans. This Batwoman represents Batman's fears of going too far in his quest to fight superhuman enemies, and also losing Catwoman.