Meltdown

Menace

Mentallo

Mentor

Mephisto

Mephistopheles

Mercury

Mesmero

Metal Master

Meteorite

MI: 13

Micro/Macro

Microbe

Microchip

Micromax

Midnight

Earth-811

Miek

Mikhail Rasputin

Millenium Guard

Millie the Model

Mimic

Mindworm

Miracleman

Miss America

Mister Fear

Mister Sinister

Mister Sinister

Deadpool

Mister Sinister

House of M

Mister Sinister

Ultimate

Misty Knight

Mockingbird

Moira MacTaggert

Moira MacTaggert

Ultimate

Mojo

Mole Man

Molecule Man