Kylun

Lady Bullseye

Lady Deathstrike

Lady Mastermind

Lady Ursula

Lady Vermin

Lake

Landau

La Nuit

Lava-Man

Layla Miller

Leader

Leech

Legion

Lei Kung, The Thunderer

Lenny Balinger

Leo (Zodiac)

Leopardon

Leper Queen

Lester

Lethal Legion

Lieutenant Marcus Stone

Lifeguard

Lightning Lords of Nepal

Lightspeed

Lila Cheney

Lilandra

Lilith

Lily Hollister

Lionheart

Living Laser

Living Lightning

Living Mummy

Living Tribunal

Lizard

Lizard (Ultimate)

Liz Osborn

Loa

Lockheed

Lockjaw

Logan

Loki

Loki (LEGO Marvel Super Heroes)

Loners

Longshot

Longshot (Ultimate)

Lord Hawal

Lords of Avalon

Lord Tyger

Lorna Dane

Luckman

Lucky Pierre

Lucy in the Sky

Luke Cage

Luminals

Luna Snow (Luna Snow)

Lyja

M (Monet St. Croix)

M.O.D.A.M.

M.O.D.O.G.

M.O.D.O.K.

M.O.D.O.K. (Iron Man 3 - The Official Game)

Mac Gargan

Machine Man

Mach IV

Madame Hydra

Madame Masque

Madame Web (Julia Carpenter)

Maddog

Madelyne Pryor

Madripoor

Madrox

Mad Thinker

Maelstrom

Maestro

Magdalene

Maggott

Magik (Amanda Sefton)

Magik (Illyana Rasputin)

Maginty

Magma (Amara Aquilla)

Magneto

Magneto (Age of Apocalypse)

Magneto (House of M)

Magneto (Ultimate)

Magneto (X-Men: Battle of the Atom)

Ma Gnuci

Magus (Adam Warlock)

Magus (Technarch)

Major Mapleleaf

Makkari

Malcolm Colcord

Malekith

Malice (Earth-161)

Man-Thing

Man-Wolf

Mandarin

Mandrill

Mandroid

Manta