The Avengers is a team of fictional superhero characters in comic books published by Marvel Comics. Originally created using preexisting Marvel characters, variously created by writer-editor Stan Lee, artist and co-plotter Jack Kirby and others, the team first appeared in The Avengers #1 (Sept. 1963).
Labeled "Earth's Mightiest Heroes", the Avengers originally consisted of Ant-Man, Wasp, Thor, Iron Man, and the Hulk. Almost from inception, however, the roster has been fluid: The Hulk departs; [1] Captain America joins [2] and soon afterwards leads a whole new team. [3] The rotating roster has become a hallmark of the team, although one theme remains consistent: the Avengers fight the foes no single superhero can withstand — hence their battle cry, "Avengers Assemble!" The team has featured humans, robots, gods, aliens, supernatural beings, and even former villains.(Wikipedia)
Avengers Team Superhero
Justice League of America
The Justice League, sometimes called the Justice League of America or JLA for short, is a fictional DC Comics superhero team.
First appearing in The Brave and the Bold #28 (1960), the League originally appeared with a line-up that included Superman, Batman, Wonder Woman, Flash, Green Lantern, Aquaman and the Martian Manhunter. However, the team roster has been rotated throughout the years with the recognizable characters Green Arrow, Atom, Hawkman, Black Canary, Captain Marvel, Plastic Man and dozens of others. Throughout the years, various incarnations or subsections of the team have also operated as Justice League America, Justice League Europe, Justice League International, Justice League Task Force, Justice League Elite, and Extreme Justice.(Wikipedia)
Image of Superman
Superman is a fictional character, a comic book superhero widely considered to be an American cultural icon. Created by American writer Jerry Siegel and Canadian-born artist Joe Shuster in 1932 while both were living in Cleveland, Ohio, and sold to Detective Comics, Inc. in 1938, the character first appeared in Action Comics #1 (June 30, 1938) and subsequently appeared in various radio serials, television programs, films, newspaper strips, and video games. With the success of his adventures, Superman helped to create the superhero genre and establish its primacy within the American comic book. The character's appearance is distinctive and iconic: a red, blue and yellow costume, complete with cape, like a circus costume, with a stylized "S" shield on his chest. This shield is now typically used across media to symbolize the character(Wikipedia)