Suggestions by @mr_blue_sky
10,931 suggestions

June Foray
as Princess Sally Acorn in Sonic The Hedgehog (1960s)
Paul Frees
as Dr. Eggman in Sonic The Hedgehog (1960s)
Billie Lou Watt
as Tails in Sonic The Hedgehog (1960s)
Wally Cox
as Sonic in Sonic The Hedgehog (1960s)

Spoiler
as "The Man-Ape" in The Fantastic Four: War Between Kingdoms

Black Panther (T'Challa)
as Next Project: in Ant-Man: Ultron Unleashed

The Fantastic Four
as Next Project: in Ant-Man: Ultron Unleashed
Game Morrison
as Johnny Lightfoot in Sonic: Fastest Thing Alive

Spoiler
as "Back in the Present..." in Lucky Luke

Steve Martin
as Numbers in Dick Tracy & Q.T. Hush: Most Wanted

Adam Driver
as Mister Sinister in X-Men in the MCU
Maya Boyd
as Storm in X-Men in the MCU

Kit Connor
as Cyclops in X-Men in the MCU
Inde Navarrette
as Rogue in X-Men in the MCU

Christopher Abbott
as Professor X in X-Men in the MCU
Maya Boyd
as Orora Munroe in Marvel Cinematic Universe

Adam Driver
as Mister Sinister in MCU X-MEN
Christopher Abbott
as Professor X in MCU X-MEN
Inde Navarrette
as Rogue in MCU X-MEN
Kit Connor
as Cyclops in MCU X-MEN