M
- Minutemen
- Miracleman Family
- Miraculous Team
- Miyagi-Do
- MODOK's 11
- Monarch's Army
- Monster Hunters
- Morlocks
- Motormouth and Killpower
- Muir Island X-Men
- Mutant Force
- Mutant Liberation Front
- Mys-Tech
N
- Nasty Boys
- National Force
- Negative 10
- Neo
- Neo Knights
- Neo-Knights
- New Avengers
- New Canaanites
- New Enforcers
- New Gods of Apokolips
- New Guardians
- New Hellions
- New Invaders
- New Justice Team
- New Men
- New Mutants
- New Reichsmen
- New Republic
- New Teen Titans
- New Warriors
- New X-Men
- Nextwave
- Neyaphem
- Nick Fury's Howling Commandos
- Night Shift
- Nightstalkers
- Norns
- Nova Corps
- Novus Orbis Librarium
- NYPD
O
- O-Force
- Octessence
- Office of National Emergency
- Olympians
- Omega Flight
- Omega Gang
- Omega Men
- Orange Lantern Corps
- Order Of The Phoenix
- Order of the Sith Lords
- Order Of The Stone
- Order Of The Web
- Outlaws
- Outsiders
- Overwatch
P
- Pacific Overlords
- Pale Riders
- Pantheon
- Paragons
- Paragons
- Payback
- People's Defense Force
- People's Protectorate
- Pet Avengers
- Pet Force
- Pillar Men
- Planetary
- Point Men
- Power Broker, Inc.
- Power Pack
- Power Rangers
- Press Gang
- Pride
- Prime Sentinels
- Project Defiance
- Project Pegasus
- Project Rebirth
- Project Wideawake
- Prosilicans
- Providence
- Psi-Force
- Psionex
- Psycho-nauts
- Psycho-warriors
- Punk Frogs
- Purifiers
Q
R
- R.C.X.
- Rangers
- Rasho
- Ravagers
- Ravenclaw
- Reavers
- Rebel Alliance
- Recorders
- Red Lantern Corps
- Red Lotus
- Redeemers
- Renegades
- Rescue Force Sigma-17
- Rescue Rangers
- Resistance
- Resistance (Sonic Forces)
- Resistants
- Retaliators
- Revengers
- Revengers
- Right
- Rocketeers
- Rogue One
- Rogues
- Roxxon Oil
- Royal Canadian Mounted Police
- Royal Flush Gang
- Runaways
S
- S.H.E.
- S.H.I.E.L.D.
- S.T.O.R.M.
- S.T.R.I.K.E.
- S.U.R.F.
- S.W.O.R.D.
- Salem's Seven
- Sannin
- Santerians
- Savage Land Mutates
- Savage Land Races
- Scarlet Knights
- Scarlet Spiders
- Scavengers
- Schutz Heiliggruppe
- Scooby Gang
- Scourges
- Secret Avengers
- Secret Defenders
- Secret Empire
- Secret Six
- Secret Six
- Secret Society of Super-Villains
- Secret Warriors
- Section 8
- Selene's Inner Circle
- Sense Of Right Alliance
- Sentinel Task Force
- Sentinels
- Sentinels Of Light
- Sentinels of Magic
- Serpent Society
- Serpent Squad
- Serpent-Men
- Settlement Defense Front
- Seven Barian Emperors
- Seven Deadly Sins
- Seven Deadly Sins
- Seven Elder Demon Emperors
- Seven Ninja Swordsmen Of The Mist
- Seven Soldiers of Victory
- Seven Warlords Of The Sea
- Seven Warlords Of The Sea
- Shadow Cabinet
- Shadow Initiative
- Shadow-X
- Shadowmasters
- Shadowpact
- Shazam Family
- SHDB Team
- Shear
- Shi'ar Imperial Guard
- SHIELD
- Shock Troop
- Siberforce
- Signers
- Sinestro Corps
- Sinister Seven
- Sinister Six
- Sinister Society
- Sinister Syndicate
- Sinister Twelve
- Sisterhood Of Mutants
- Sisterhood of the Wasp
- Sisters of Sin
- Sith Eternal
- Sith Order
- Six Big Men
- Six Pack
- Six-Fingered Hand
- Skeleton Crew
- Skrull Kill Krew
- Skylanders
- Skynet
- Slaughter Lords
- Slingers
- Slytherin
- SMASH
- Soldiers of Misfortune
- Sons of Satannish
- Sons of the Serpent
- Sons of the Tiger
- Sovereign Seven
- Soviet Super-Soldiers
- Space Phantoms
- Space Pirates
- Spaceknights
- Spartoi Empire
- Special Executive
- Spider-Army
- Spider-Slayers
- Spirits of Vengeance
- Squadron of Justice
- Squadron Savage
- Squadron Sinister
- Squadron Supreme
- Stabbington Brothers
- Stane International
- Star Guardians
- Star Masters
- Star Masters
- Star Sapphire Corps
- Starfleet
- Starforce
- Starjammers
- Stark Enterprises
- Stark Fujikawa
- Stark Industries
- Stark International
- Stark Solutions
- Stormwatch
- Straw Hat Pirates
- Strikeforce: Morituri
- Styx and Stone
- Subterraneans
- Suicide Squad
- Sunset Riders
- Super Buddies
- Super Soldiers
- Super Villian Girls
- Super-Axis
- Superfriends
- Superguardians
- Superhero Boys
- Superhero Girls
- Superhuman Restraint Unit
- Superior Four
- Superiour Six
- Superman Family
