Share. After Ultron, who is next? After Ultron, who is next?

Avengers: Age of Ultron is almost upon us, but even though we haven't seen it yet, we can't help but wonder what other villains will be joining the Marvel Cinematic Universe to make hell the Avengers.

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Here are seven Avengers villains that we want to see on the big screen.

Baron Zemo and the Masters of Evil

The Masters of Evil are the dark mirror of the Avengers -- a team of supervillains who just want to bring the heroes down and rule the world. There have been many leaders over the years, but for the movies we want to see the classic one -- Nazi scientist Baron Zemo, who has ties to Captain America. And wouldn't you know it, the good Baron was confirmed to be in Captain America: Civil War, which sets the stage for him to potentially spin out into a big Avengers villain.

The Masters of Evil team roster constantly shifts, but at the end of the day, it’s always comprised of baddies chosen to take down specific Avengers. Radioactive Man, Enchantress, Executioner, Wonder Man, and Goliath are just a few who have been counted among their number.

Because they’re built by design to defeat the Avengers, clashes with the Masters of Evil push the Avengers to the brink, often defeating them outright and causing the Avengers to question whether they have it in them to continue being heroes. They always prevail, of course, but never without some scars.

Besides, it would be refreshing to see the Avengers take on a team of dangerous villains rather than just one big baddie like Loki or Ultron and their minions. Now only if we could do something about the name…

Kang the Conqueror

As confusing as time travel can be, it can also be a whole lot of fun, and no one does it better than Kang. He’s a warlord from the 40th century who travels throughout time to collect weapons, artifacts, and knowledge that will help him conquer the world. If that's not enough, there are Kangs from alternate timelines -- Rama-Tut, Immortus, Scarlet Centurion -- meaning there can be more than one time-traveling supervillain for the Avengers to deal with at the same time.

But the guy has a heart, too. His stories often involve Princess Ravonna, a woman he loves who is forever trapped in near-death stasis, and for all his power, he cannot wake her. Gets you right there, doesn’t it?

Kang’s clashes with the Avengers are always a sight to behold, often taking them into the distant past or the far future where they encounter strange creatures and technology. Or he just shows up in the present with weapons so advanced that the heroes don’t stand a chance. After a few Avengers movies, it would be great to see them fight Kang and explore the history, and future, of the MCU like never before.

The Kree and Skrulls

We’re counting these two alien races as as one entry, and we’ll explain why in a moment.

The Kree are blue-skinned aliens who live in a militaristic society that worships a giant glowing green head known as the Supreme Intelligence. Remember Ronan the Accuser from Guardians of the Galaxy? He was a Kree, if you want an example of how dangerous they can be. The Kree have also popped up in Marvel’s Agents of SHIELD TV show, but we’d love to see them make the jump to the big screen so they can clash with these guys…

The Skrulls! Ugly, green, and just plain ol’ mean. Theirs is a threat so great that they could have their own movie -- Avengers: Secret Invasion -- adapting the story where they invaded Earth and nearly conquered it by using their shape-shifting powers to fill the planet with spies and sleeper agents, even within the Avengers. [Editor's Note: Marvel Studios doesn't wholly own the movie rights to the Skrulls -- Fox also has some claim -- but hey, it would be worth wading through those legal waters to make it happen.]

But instead of seeing either of these guys in their own flick, we’d love to see them clash in an adaption of The Kree-Skrull War. It was the first truly epic Avengers event in the comics, so it would only be fitting for this conflict to make it to the big screen. It features the Kree and Skrulls starting an intergalactic war where Earth becomes part of the battlefield, causing the Avengers to get involved. Find us someone who doesn’t want to see the Avengers punching alien ships in space and we’ll be impressed.

The Hood

The Hood isn’t an evil genius or a merciless tyrant or any of those other standard villain types. He’s just a guy named Parker Robbins who is a liar and a crook. A really, really good liar and crook. He becomes the hood when he happens upon a magical hooded cape and pair of boots that give him powers of invisibility and flight.

Those tricks of course helped him in his life of crime, but when we learned that they were linked to a powerful demon from Doctor Strange’s rogue’s gallery, it opened the door for him to become the Godfather of Marvel’s supervillain community.

While this might make the Hood seem a better fit for Marvel’s street-level Netflix series, know that he can go big, too, like in a story where he began rounding up all of the Infinity Gems -- you know, those obscenely powerful and dangerous stones that Thanos is after in the movies. Hey, if you’re a good thief, may as well steal stuff that’ll give you infinite power.