Every superhero needs a villain, preferably a good one, because what else would he be doing otherwise, except saving kittens from the trees? Some villains are more iconic than others, and the DC comics have plenty of those. Mera has fought many villains, either on her own or on the side of her partner Aquaman.

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She may not be the most famous female superhero but that doesn't mean she's weak. She has a rich set of powers and isn't afraid to use them. If Mera somehow crossed over to the Marvel universe and took on its villains, she'd defeat some of them but would lose against others.

10 Could Defeat: Loki

Loki is universally beloved between most of Marvel fans, especially after Tom Hiddleston portrayed him multiple times in both the Thor and Avengers movies. Loki is a powerful villain, but his strongest power isn't his physical prowess but his ability to trick his opponents. He's called the God of Mischief for a reason, after all.

Still, once Mera learns that she can't trust Loki, his illusions, tricks and his ability to change shape and become someone else, she can defeat him in a physical fight since she's stronger than him. Loki would do his best but Mera is too clever to be fooled more than once.

9 Would Lose: Doctor Doom

Doctor Doom is the number one villain of Fantastic Four, and he didn't get this reputation by just sitting in the background and looking pretty. He's very intelligent and cunning which makes him a dangerous opponent all by itself. He has managed to steal the heroes' powers before and given the chance, he'd probably do the same to Mera.

If that wasn't enough, he has a large army at his disposal and no matter how good Mera is at fighting, she can't take on a whole army. Doctor Doom's Doombots don't get tired but Mera does and they would eventually tire her down.

8 Could Defeat: Venom

The fight between Mera and the alien symbiote Venom would certainly be impressive to watch but it wouldn't end well for everyone's favorite symbiotic villain. In the water, Venom doesn't stand a chance since Mera could as well be called the queen of water.

On the land, the fight is more balanced but Mera would still defeat Venom, albeit not without difficulties. She's fought opponents bigger than her before and came out victorious from the fight, so there's no reason to believe it wouldn't be the case in here as well, especially if you take her strength and training into consideration.

7 Would Lose: Deadpool

To say that Mera wouldn't like Deadpool - at all - would be the biggest understatement of the century. Mera isn't fond of people who run their mouth freely, and that's the basic definition of Deadpool. The Merc with a Mouth is as deadly as he can be annoying.

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He also walks the fine line between being a villain and an antihero, but Mera would consider him the former and would try to bring him down, especially if he was hired to kill her, Arthur or their child. But since Deadpool has the healing factor and is pretty much immortal, Mera wouldn't be able to get rid of him for good.

6 Could Defeat: Kingpin

Wilson Fisk aka the Kingpin is both Daredevil's and Spider-Man's nemesis in the comics. Both of these superheroes have defeated him before, so it's safe to assume that if Daredevil, who doesn't have super strength, managed to do it, so would Mera.

The key for her victory would be to get to Fisk when he isn't surrounded by his army so that she wouldn't have to fight a group of goons who could potentially weaken her and also give Kingpin the chance to escape. In a one on one combat, Mera will use her superior strength to finish the Kingpin off quickly.

5 Would Lose: Red Skull

This one is a bit debatable but under the right circumstances, the Red Skull could win over Mera or at least hold her back long enough to make his escape, disappear in the shadows and emerge once again somewhere else. Red Skull is strong, albeit probably not as strong as Mera, but he's also very clever and cunning. If he found out that Mera was coming to get him, he would have enough time to prepare a trap and lure her into it.

Plus, he has the Hydra goons at his disposal and while goons with guns might not be enough to take Mera down, certainly not for good, they'd still present enough challenge for the Red Skull to escape while Mera would be busy fighting them.

4 Could Defeat: Black Cat

Black Cat is one of Spider-Man's most memorable villains and she and the wallcrawler also had a brief romance going on in the comics. Black Cat was able to take on Spider-Man but she probably wouldn't be as successful when fighting Mera.

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Black Cat is strong, agile and athletic but Mera is all of this, and more since Felicia doesn't possess superhuman strength like her opponent. The only Black Cat's power that could throw Mera off her balance for a moment is her ability to manipulate luck in her favor, but even that wouldn't be enough for Black Cat to win.

3 Would Lose: Dormammu

Dormammu is a powerful cosmic entity, one that Doctor Strange called a threat to the life of the whole universe. No offense to Mera, but no-one would call her the same way and if she went against Dormammu on her own, she wouldn't stand a chance.

Not only are his powers something she never had to face before, at least not on such a large scale, but even if Dormammu himself had no other powers, he has an almost neverending army of demons at his disposal and Mera wouldn't be able to defeat hundreds, if not thousands of demons all on her own, no matter how strong she is.

2 Could Defeat: Bullseye

When you consider which Marvel villain would win in a fight against Mera, the general rule of the thumb is - if the villain is non-powered, the chances are big that he will lose. There might be a few exceptions, of course, but in general, this is true, and it would also be the case with Bullseye.

Bullseye is known for killing his victims with guns and he has a wonderful aim but Mera had faced people with guns before, even more of them at the same time, and she was able to win anyway. Bullseye might get in a hit, but Mera would squash him with a wall made of water before he could cause her any serious injury.

1 Would Lose: Thanos

It would be a brave effort from Mera's part but she wouldn't be able to defeat Thanos, not on her own anyway. Her only chance would be to team up with other heroes, the more the better, and even then it might not be enough. Thanos is super strong, but he's also without mercy, which makes him even more dangerous.

He's been able to defeat a larger number of people and do so without difficulty. If he had the Infinity Gauntlet at his disposal on top of all this, he'd end Mera even faster by just one snap of his fingers, and no water powers or any other would help Mera.

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