'''Additional Cast'''
* Jonathan Adams - Absorbing Man, Korg
* Dee Bradley Baker - Wendigo, Wendigo King, Goom
* Drake Bell - Spider-Man
* Troy Baker - Loki
* Jeff Bennett - The Collector
* Steve Blum - Devil Dinosaur, Sauron, Wolverine, Wrecker
* David Boat - The Thing
* Chris Bosh - Heimdall
* Jack Coleman - Dr. Strange 
* Chris Cox - Star-Lord
* Grey DeLisle - Moloid Shaman
* John DiMaggio - Galactus
* Robin Atkin Downes - Annihilus, Abomination, Mr. Fantastic
* Mary Faber - Crystal, Medusa
* Nika Futterman - Gamora, Lilandra Neramani
* Clare Grant - Titania
* Kevin Greivoux - Super-Skrull
* Laura Harris - Elloe Kaifi
* Mark Hildreth - Deathlok
* John Paul Karliak - Doc Samson
* Tom Kenny - Dr. Octopus, Impossible Man
* Maurice LaMarche - Dr. Doom
* Phil LaMarr - Dormammu
* Stan Lee - Stan the Salesman, Mayor Stan
* David Harvard Lawrence - Mole Man
* James C. Mathis III - Terrax, Malekith, Ronan the Accuser
* Chi McBride - Nick Fury
* Nolan North - Gorgon, Maximus
* Liam O'Brien - Arkon
* Adrian Pasdar - Iron Man
* Enn Reitel - Laufey
* Kevin Michael Richardson - Ego the Living Planet, Groot
* J.K. Simmons - J. Jonah Jameson
* David Sobolov - Drax
* James Arnold Taylor - The Leader, Blastaar, Triton, Human Torch
* Kari Wahlgren - Invisible Woman
* Travis Willingham - Thor
Organisationer