Second string group of femme fatales.

A group of Canada's last freedom fighters.

Female nazi team

Powerful beings selected from different dimensions by Ubiquitor

Simon Utrecht and his compatriots attempt to recreate the historic flight of the Fantastic Four, with mixed results.

Fish-like race of Atlanteans

The Uhumele Crew crews the spaceship the Uhumele. They help Dass Jennir and Bomo find his daughter.

A race of Shape-shifting aliens with powerful mental abilities. Their natural form resembles a giant tentacled fish.

The Ultimate Federalist Freedom Fighters (UFFF) is a soviet fighting force, and the Earth-717 equivalent of the Fantastic Four

Marvel Knights in the Ultimate Universe. They were put together once again by Daredevil, and plan to kill the "Kingpin of Crime".

Originally a group of supersoldiers recruited by Nick Fury as a means of defending the world and protecting America's best interests under the department of Homeland Security. The team at one point distanced themselves from the US government to deal with threats independently but have recently joined back up with S.H.I.E.L.D. Now they serve as the ultimate team to fight any and all disturbances in the Marvel Universe.

The Ultimate Universe's answer to the original Sinister Six, this grouping brings together six of the more powerful characters from Marvel's Ultimate Universe into one team.

ULTIMATUM, also known as Flag Smashers, are a terrorist organization led by Flag Smasher & secretly funded by the Red Skull.

Malibu's flagship superhero team consisting primarily of "Ultras".

The "Ultra Megas" are a team of five superheroes of incredible power. They are the premier super hero team from the Wildguard comic. Although their name says 5, the number has changed over the years.

The Ultras is an race of Ultramen, women, and children.

The Ultraviolet Corps is the Lantern Corps of the unseen light, part of the "Invisible Emotional Spectrum". The Ultraviolet Corps is powered by the sentient sun, Umbrax.

Vision-like robots who are part of the Descendant movement.

The Ultravixens are a team of space-faring females that briefly entranced Mr. Majestic.

Dr. Reginald Hargreeves adopted seven special children and formed a superhero team called the Umbrella Academy.

A group of humans led by Sublime that uses mutant body parts to augment themselves with superhuman powers.

Group of blood thirsty ninjas, whose motto is "What is buried...Always comes to the Light".

A superhero team, that protected the planet Xanthu, in the 30th century. Many members went on to join the Legion of Superheroes.

An Indian group of super heroes, apparently based in New Delhi.

A race of aliens that destroy any planet that does not renounce religion and faith.

The un-deads are the result of humans being infected with the fluid of a Master of the Night and are similar to classic vampires.

Special team of soldiers scurrying on the fringes on Sugar Man´s defense parameters. Working as shadow permiting but in the light they become tangible.

An alien race of stone humanoids with insides of lava.

United Not Deterred Even Routinely. Given Righteousness, Or Unity Neither Determined.

The Underground Legion was a secret team of heroes that acted against otherworldly threats.

Nomadic Secret Society who abducts homeless people and auctions them off to the rich and powerful

Sentient creatures from the Planet X fed up with their poor treatment

The Atlantis based branch of the Tiny Titans

They were science gone wrong. They were created in the labs of Project Cadmus. They were created by mad geneticist Dabney Donovan.

Ancient, non-humanoid demons from another dimension.

The native people of the planet Ungara located in Space Sector 2814. The most famous Ungarans are the legendary Green Lantern Abin Sur and his evil son Amon Sur.

A group of villains led by Demolitia. In 1998, they attacked Detroit as part of the conquistador's grand scheme to discredit america's hero.

Mythical creatures with a single white, spiraled horn protruding from its forehead.

Team of mostly extraterrestrial villains lead by the mad Graviton aimed to conquer the world and destroy its heroes.