Alright, I dont know if this game will work or not, but WTF I tried.
I left off races (Kree, Skrulls, Martians) and agencies/organizations (Checkmate, SHIELD, GI Joe, HYDRA, AIM, Intergang). I also realize this game is flawed because of the different versions of teams...just picture whatever version of a team you like best. We'll see if this big ass game works.
Agents of Atlas 3
All-Star Squadron 3
Alpha Flight 3
Authority 3
Avengers 3
Avengers West Coast 3
Beta Flight 3
Black Lantern Corps 3
Blue Lantern Corps 3
Brotherhood of Evil Mutants 3
Challengers of the Unknown 3
Champions 3
Crime Syndicate of Amerika 3
Cyberforce 3
Dark Avengers 3
Dark X-Men 3
Defenders 3
Doom Patrol 3
Eternals 3
Excalibur 3
Exiles 3
Fantastic Four 3
Frightful Four 3
Futurians 3
Gen 13 3
Generation X 3
Green Lantern Corps 3
Guardians 3
Guardians of the Galaxy 3
Guardians of the Universe 3
Hellfire Club 3
Horsemen of Apocalypse 3
Imperial Guard 3
Indigo Lantern Corps 3
Infinity Inc 3
Infinity Watch 3
Inhumans 3
Invaders 3
Justice League 3
Justice League International 3
Justice Society of America 3
L.E.G.I.O.N. 3
League of Extraordinary Gentlemen 3
Legion of Doom 3
Legion of Super-Heroes 3
Masters of Evil 3
Micronauts 3
Mighty Avengers
Morlocks 3
New Avengers 3
New Gods 3
New Mutants 3
Nova Corps 3
Omega Men 3
Outsiders 3
Red Lantern Corps 3
Rogues’ Gallery 3
Runaways 3
Secret Six 3
Sinestro Corps 3
Sinister Six 3
Soviet Super Soldiers 3
Squadron Sinister 3
Squadron Supreme 3
Starjammers 3
Stormwatch 3
Suicide Squad 3
Teen Titans (D1ck Grayson) 3
Teen Titans (Tim Drake) 3
Thunderbolts 3
TMNT 3
Ultimates 3
U-Foes 3
Uncanny X-Men 3
Watchmen 3
Wetworks 3
Wild CATS 3
Warriors Three 3
Wrecking Crew 3
X-Factor 3
X-Force 3
Young Avengers 3
Young Justice 3
Youngblood 3