Suggestions by @mr_blue_sky

Will Ferrell

as The Dirty Bubble (CEM) in The Ultimates: Reign Of Doom

Marco Barricelli

as Stromboli (CEM) in The Ultimates: Reign Of Doom

Ice Cube

as Captain Gantu (CEM) in The Ultimates: Reign Of Doom

Chris Rock

as Reuben (CEM) in The Ultimates: Reign Of Doom

Asher Morrissette

as Luiaard in The Ultimates: Reign Of Doom

Brett Gelman

as Egghead (CEM) in The Ultimates: Reign Of Doom

Jon Bernthal

as The Melter in The Ultimates: Reign Of Doom

Spoiler

as "Rearrange the Team Member" in The Ultimates: Reign Of Doom

Jason Momoa

as Rocksteady (CEM) in The Ultimates: Reign Of Doom

Laurence Fishburne

as Assassimon in The Ultimates: Reign Of Doom

Mandy Patinkin

as Professor Pippy P. Poopypants Esq. (CEM) in The Ultimates: Reign Of Doom

Billy Crystal

as Mouser (CEM) in The Ultimates: Reign Of Doom

Hank Azaria

as Dr. Hämsterviel (CEM) in The Ultimates: Reign Of Doom

Tim McGraw

as Shocker (CEM) in The Ultimates: Reign Of Doom

Leigh Gill

as M'Ling in The Ultimates: Reign Of Doom

Lee Jung-jae

as The Atomic Ghost (CEM) in The Ultimates: Reign Of Doom

Feathers McGraw

as Feathers McGraw (CEM) in The Ultimates: Reign Of Doom

Sean Gunn

as Othello in The Ultimates: Reign Of Doom

Wile E. Coyote

as Wile E. Coyote in The Ultimates: Reign Of Doom

Nicholas Hoult

as Dr. Flug Slys (CEM) in The Ultimates: Reign Of Doom