[3] A second version, formed by European villain Count Nefaria reappears in the title, composed of Living Laser, Whirlwind and Power Man.

[4] The Grim Reaper returns in the title West Coast Avengers, leading a third version against the superhero team consisting of Black Talon (Barone), Goliath, Man-Ape, Nekra, and Ultron-12.

They were led by the Porcupine and consisted of Attuma, Batroc the Leaper, Bulldozer, Black Tiger, Kurr'fri of the Saurians, Gorilla-Man (Nagan), Piledriver, Sabretooth, Thundra, Trapster, Unicorn, Whirlwind, and Wrecker.

[7] In the title Avengers West Coast the demon Satannish creates another version using the souls of four infamous historical killers that were found in Mephisto's section of Hell.

[9] Absorbing Man, Grey Gargoyle, Mister Hyde, and Tiger Shark later reformed the Lethal Legion and end up fighting the Avengers.

[10] An alien version of the Lethal Legion was formed by Grandmaster to go up against Challenger's Black Order in a contest where Earth is the battlefield and they had to collect the Pyramoids.

While the Blood Brothers, Mentacle, and Metal Master II faced off against Black Dwarf, Black Swan, and Supergiant's psychic projection in Rome, Glah-Ree of the Kree, Captain Glory, Drall, and Ferene the Other faced off against Corvus Glaive, Ebony Maw, and Proxima Midnight in Cusco, Peru.

While Grey Gargoyle and Whirlwind attack the people present, Living Laser helps Count Nefaria to operate the Catalyst.

[16] As a side-effect of Sin-Eater's suicide upon copying Madame Web's precognition revealed that Kindred was using them, the Lethal Legion regained their sins and are among the villains that went on a rampage.

[17] After having separated himself from Ultron upon his defeat, a fragment of Hank Pym's conscious recreated his body in an older appearance and worked with Black Ant into killing villains (consisting of Blizzard, Bullet, Cobra, Lodestone, Mortar of the Bastards of Evil, Oddball, Piecemeal, Speed Demon, Sunstroke, and Supercharger) with his ant projectiles and reviving them into his Lethal Legion in order to prepare for Ultron's return while faking their deaths.

In the nick of time, Ant-Man, Mayor Luke Cage, Nadia van Dyne, Stinger, Valkyrie, and Vision show up to help fight the possessed Lethal Legion.

When Ultron was defeated and Ultron-12 creates a new body for himself that he calls Mark Twelve, the Lethal Legion recover as they leave with Hank to regroup in Sub-Atomica and prepare for Ultron's return as part of Protocol S.[18] The Lethal Legion appear in Heroes Reborn, formed by the Enchantress and consisting of the Executioner, the Scarlet Witch, Ultron-5, and Wonder Man.

[19][20] The Lethal Legion appears in The Super Hero Squad Show, founded and led by Doctor Doom and consisting of the Abomination, MODOK, Mole Man, Fin Fang Foom, Megataur, Tricephalous, Manoo, Klaw, Toad, Melter, the Wrecking Crew, Sabretooth, the Juggernaut, Pyro, Whirlwind, Zzzax, Egghead, the Ringmaster, Paste Pot Pete, Mystique, the Crimson Dynamo, and Batroc the Leaper.

In the second season, Molecule Man and Volcana join the Lethal Legion to help break Doom out of the Vault and combat Thanos and the Dark Surfer.