In many ways, Guardians of the Galaxy has been Marvel’s most surprisingly successful film. While most comic book properties are inherently fantastic and a more than a bit weird, Guardians moved things in a truly bizarre direction. The movie takes place almost entirely in outer space, and the main cast are constantly surrounded by wacky and wild alien races. In fact, four of the film’s protagonists are freaky aliens themselves, ranging from green-skinned humanoid to anthropomorphic trash panda.
That being said, there are dozens of fictional alien races to play with in the Marvel universe, and some are so weird that they definitely won’t appear in Guardians of the Galaxy Vol. 2. A few of the potential candidates are too visually bizarre to work on the silver screen, while others have traits that could only ever translate as straight-up goofy. The success of Guardians definitely broadened the potential types of stories that Marvel can get away with telling, but they’re not yet ready to explore the deepest and darkest corners of their fictional cosmos.
Marvel was definitely horsing around when it created the Kymellians, a race of equine-headed but extremely intelligent aliens. Like their Earth-bound look-alikes, Kymellians are very friendly to humans, and have aided several heroic factions in the past, most notably the Power Pack and Fantastic Four.
Ridiculous facial features aside, the Kymellians are a proud and noble race that always seem to fall on the side of good. That being said, it still had to be slightly embarrassing when Inhuman king Black Bolt had to take one as his bride in a political move.
The Builders were a race at the center of an Avengers story that was built up for years and culminated in the celebrated Infinity crossover. Basically, they are the beings responsible for the structure of Marvel’s multiverse. They’ve existed since the dawn of time, sending out various probes to create and monitor life on other planets.
The Builders are insectile in appearance and eventually decide that Earth must be destroyed to save the rest of the multiverse, although the Avengers eventually stop them (oh, and save the rest of existence too).
The Space Phantoms are one of the first alien races to plague the Marvel universe, as one showed up to torment the Avengers almost immediately after their publication. Space Phantoms are hideous little bug-eyed goblins, but their physical appearance is unimportant given their powers.
These creepy fellas have the ability to switch places with any individual, sending their victim to an alternate dimension while they gain their appearance and powers. The first Space Phantom used his power to impersonate the Hulk, which led to the jade giant quitting the Avengers when he saw how little they trusted him.
Is there anything worse than space-parasites? The Brood are a disgusting race of infectious insects that lay eggs within the bodies of other races, causing them to slowly turn into Brood themselves. These nasty reproductive methods have made the Brood a long-standing enemy of many Marvel heroes, most notably the X-Men. The Brood's rights, therefore, are tied up with the X-Men and thus Fox.
A Brood infection tends to spiral quickly out of control as more and more heroes succumb to their power, although Wolverine’s healing factor has saved his fellow mutants on numerous occasions.