Roster
The series features a team broadly based on the roster for the 1984 Avengers spin-off series The West Coast Avengers, composed of the Wasp, Wonder Man, Tigra, Hawkeye, and Scarlet Witch (Hawkeye and Scarlet Witch were also both in the Iron Man animated series as members of Force Works), led by Ant-Man (a.k.a. Giant-Man), with the Falcon and the Vision joining in the opening two-parter. For undetermined reasons (perhaps due to their rights being tied up in planned movie projects), the Avengers' "Big Three" were not regular fixtures in the series – Captain America and Iron Man made only guest appearances in one episode each, while Thor did not appear outside of the opening titles. Captain America appears in one episode, "Command Decision". The story involves the Masters of Evil and a flashback to Captain America defeating Baron Zemo. Iron Man, meanwhile in the episode "Shooting Stars", helps the Avengers thwart the Zodiac's plan to send a radioactive satellite crashing to Earth.
The series features many of the Avengers' major comic book foes, including Ultron, Kang the Conqueror, Egghead, the Masters of Evil (consisting of Baron Helmut Zemo, Tiger Shark, Absorbing Man, Moonstone, Whirlwind, Boomerang, Cardinal, and Dragonfly), the Grim Reaper (this version wore full body armor and a helmet featuring a skull-like paint job; his ties to Wonder Man remained intact) and the Zodiac, as well as associated characters such as the Swordsman, the Circus of Crime, Namor, Attuma, Agatha Harkness and the Salem's Seven.
The show made several fan-friendly references to aspects of the characters' comic book history that were otherwise not expanded upon for the uninitiated, such as the Falcon and Captain America's partnership, Hawkeye's partial deafness or Namor's half-breed nature. Beyond this, however, the series bore little in the way of similarity to the comics, mainly due to its wholesale redesign of the cast, characterized by asymmetrical costume design and the most infamous element of the series – Ant-Man, Wasp, Hawkeye and Falcon all wore suits of battle armor, which they donned in Super Sentai-inspired "power-up" sequences. Also in this incarnation, Tigra is an athlete who underwent genetic treatments to give her a competitive edge. These treatments went awry, leaving her with the form and abilities of a cat.
Read more about this topic: The Avengers: United They Stand