Suggestions by @luisperezcozar

Seth Green

as A-Bomb in Scooby-Doo! & Hulk and the Agents of S.M.A.S.H.

Clancy Brown

as Red Hulk in Scooby-Doo! & Hulk and the Agents of S.M.A.S.H.

Frank Welker

as Fred Jones in Scooby-Doo! & Hulk and the Agents of S.M.A.S.H.

Matthew Lillard

as Shaggy Rogers in Scooby-Doo! & Hulk and the Agents of S.M.A.S.H.

Fred Tatasciore

as Hulk in Scooby-Doo! & Hulk and the Agents of S.M.A.S.H.

Frank Welker

as Scooby-Doo! in Scooby-Doo! & Hulk and the Agents of S.M.A.S.H.

Steven Weber

as Scarlet Goblin in Scooby-Doo! & Ultimate Spider-Man

Steven Weber

as Ultimate Goblin in Scooby-Doo! & Ultimate Spider-Man

Eric Bauza

as Swarm in Scooby-Doo! & Ultimate Spider-Man

Christopher Daniel Barnes

as Wolf Spider in Scooby-Doo! & Ultimate Spider-Man

Christopher Daniel Barnes

as Electro in Scooby-Doo! & Ultimate Spider-Man

Diedrich Bader

as Kraven the Hunter in Scooby-Doo! & Ultimate Spider-Man

Dante Basco

as Scorpion in Scooby-Doo! & Ultimate Spider-Man

Dee Bradley Baker

as Sandman in Scooby-Doo! & Ultimate Spider-Man

Dee Bradley Baker

as Carnage in Scooby-Doo! & Ultimate Spider-Man

Dee Bradley Baker

as Lizard in Scooby-Doo! & Ultimate Spider-Man

Max Mittelman

as Rhino in Scooby-Doo! & Ultimate Spider-Man

Tom Kenny

as Wizard in Scooby-Doo! & Ultimate Spider-Man

J.K. Simmons

as J. Jonah Jameson in Scooby-Doo! & Ultimate Spider-Man

Clark Gregg

as Agent Coulson in Scooby-Doo! & Ultimate Spider-Man