James Sanders first appears as the Whizzer in the final panel of The Avengers #69, the first chapter of a three-issue storyline by writer Roy Thomas and penciller Sal Buscema. The story arc introduced the supervillain team the Squadron Sinister, whose four members were loosely based on heroes in DC Comics' Justice League of America, with the Whizzer based on the Flash.
The Squadron Sinister are created by the cosmic entity the Grandmaster to battle the champions of the time-traveling Kang – the superhero team the Avengers. The Whizzer battles Avenger Goliath, but the fight is interrupted by the Black Knight. The Avengers eventually defeat the Squadron and they in turn are abandoned by the Grandmaster. The Squadron reappear in the title Defenders, reunited by the alienNebulon. The villains receive greater power in exchange for the planet Earth, and create a giant laser cannon in the Arctic to melt the polar ice caps, thereby covering the entirety of the Earth's surface in water. The superhero team the Defenders prevent the scheme and defeat the villains, with Namor the Sub-Mariner humiliating the Whizzer. After this defeat the Whizzer and his teammates are teleported offworld by Nebulon, returning with an energy-draining weapon. The Squadron Sinister plan to threaten the Earth again but are defeated once more by the Defenders and the Avenger Yellowjacket. The character has another brief encounter with several members of the Avengers, who seek a way to separate the power prism of Doctor Spectrum from fellow Avenger the Wasp. The Whizzer disassociates himself from the Squadron Sinister and adopts a new costume and alias, Speed Demon. Writer Bill Mantlo and penciller Bob Hall revamped the character in the title The Amazing Spider-Man, with Sanders returning to crime with a new costume and the alias Speed Demon. The character makes a number of appearances in titles, including Marvel Team-Up against Spider-Man and Fantastic Four member the Human Torch, in Amazing Spider-Man as a member of the criminal group the Sinister Syndicate,Marvel Tales, Quasar, and in the graphic novelAvengers: Deathtrap – The Vault. Speed Demon makes another abortive attempt to kill Spider-Man in the limited seriesThe Deadly Foes of Spider-Man; battles the mutant Wolverine; features in Web of Spider-Man; encounters Spider-Man and the New Warriors in Spectacular Spider-Man Annual #12, Web of Spider-Man Annual #8, and New Warriors Annual #2 ; and in the title Captain America briefly skirmishes with the hero at an A.I.M. weapons expo. After an appearance in the limited series Spider-Man: The Power of Terror, Speed Demon is employed by crime boss Justin Hammer to battle the superhero team the Thunderbolts. Speed Demon is recruited to join the New Thunderbolts but is eventually ejected from the team by heroine Songbird for stealing money to fund the team. After a confrontation and unexpected skirmish with an apparently resurrected Hyperion and a new Doctor Spectrum, Speed Demon defects to join the reformed Squadron Sinister. Courtesy of a phenomenon known as the Wellspring of Power, an interdimensional source of superhuman abilities, the Grandmaster – guiding force behind the return of the Squadron Sinister – has been increasing the Squadron Sinister's powers. He directs Speed Demon and the Squadron to find the main source of the Wellspring. For a time the character, deprived of the use of the Wellspring, is powerless and has his legs broken in a battle with New Thunderbolts member Joystick. Empowered in the final battle against the New Thunderbolts, Speed Demon takes advantage of the chaos caused when Zemo defeats the Grandmaster to viciously beat Joystick in retaliation for his injuries. Speed Demon and the members of the Squadron scatter and escape. Speed Demon appeared in as one of the villains in the bar. He later joined the Hood's gang, and attacks Mister Negative. As part of the Marvel NOW! event, Speed Demon appears as a member of the latest incarnation of the Sinister Six. Speed Demon features as one of the main characters in Superior Foes of Spider-Man. Speed Demon later appears robbing a pawn shop with Man Mountain Marko when they are caught by Rage. After a brief fight, they escape while Rage gets arrested by the Americops. He is later captured by Sam Wilson, as the former Captain America, who forced him to confess of his and Marko's involvement in the pawn shop robbery.
Powers and abilities
As a result of mutagenic chemicals concocted under the Grandmaster's mental guidance, Speed Demon possesses superhuman speed, stamina, and reflexes. The character can create cyclones and run up walls and across water. Speed Demon's superhumanly fast thought processes and reflexes enable the character to perceive his surroundings while moving at high speeds, pick up objects, and execute complex acrobatic maneuvers. James Sanders possesses a master's degree in chemistry.
In Marvel Zombies, he becomes an agent for the zombiefied Kingpin. He is sent with Quicksilver and the Whizzer to pursue Machine Man, who is opposing the zombie efforts. The Whizzer is flattened and the other two are shredded by a taut-wire trap.
