Daily Bugle, Dark Avengers, Dark Riders, Dark X-Men, Daughters of Dragons, Dawn of White Light, Daydreamers, Deadheads, Deadly Boys , Deadpool Corps, Death Squad (Foreigner/Nefaria), Death-Throws, Deathwalkers, Deathweb, Deep Six (Attuma), Deep Six (Namor), Defenders, Defenders (villains), Defenders for a Day, Defenders of New Jersey, Department Zero, Derangers, Descendants, Desert Dwellers, Desert Stars, Desert Sword, Displaced Paranormals Division, Doom Maidens, Ducky Dozen, Dynasty, Earth Force, Elders of the Universe, Emissaries of Evil, Enforcers, Eugenix, Euroforce, Excalibur, Excelsior (Squad), Exemplars, Exemplars (Squad), Factor, Fangs, Fantastic Force, Fantastic Four, Fast Five, Fathom Five, Fearsome Four, Fellowship of Fear, Femizons, Femme Fatales, Fifty State Initiative, First