Suggestions by @VitorFleith

John Hughes

as Hated Personalities in Ranks

King Kong (King Kong Lives)

as Things that are WORSE than Teen Titans Go! in Things that are way worse than Teen Titans GO!

Beach Episode (The Amazing Digital Circus episode)

as Things that are WORSE than Teen Titans Go! in Things that are way worse than Teen Titans GO!

Joel Schumacher

as Director in Teen Titans (2002)

Tim Burton

as Director in Teen Titans (2002)

Sam Raimi

as Director in Teen Titans (2002)

James Franco

as Beast Boy in Teen Titans (2002)

Tobey Maguire

as Robin/Nightwing in Teen Titans (2002)

Willam Defoe

as Deathstroke in Teen Titans (2002)

Thomas F. Wilson

as Slade in Teen Titans (1989)

Michael J. Fox

as Robin in Teen Titans (1989)

Batman (Michael Keaton)

as Robin in Teen Titans (1989)

Robin Williams (The Joker)

as Slade in Teen Titans (1989)

Tim Curry

as Slade in Teen Titans (1989)

Mark Hamill

as Slade in Teen Titans (1989)

Willam Defoe

as Slade in Teen Titans (1989)

Robert De Niro

as Slade in Teen Titans (1989)

Kevin Peter Hall

as Slade in Teen Titans (1989)

Jack Nicholson (De-Aged CGI)

as Slade in Teen Titans (1989)

Dick Dastardly (Jim Carrey)

as Ercole Visconti in Luca