Suggestions by @cartoonmultiverse

Black Panther/Shuri (Marvel Cinematic Universe)

as Shuri/Black Panther in Warriors of the Earth: The Symbiote Wars Part 1

Kitana

as Kitana in Warriors of the Earth: The Symbiote Wars Part 1

Toph Beifong

as Toph Beifong in Warriors of the Earth: The Symbiote Wars Part 1

Spider-Man (Marvel Cinematic Universe)

as Peter Parker 1/Spiderman in Warriors of the Earth: The Symbiote Wars Part 1

Donatello (TMNT 2003)

as Donnie (03) in Warriors of the Earth: The Symbiote Wars Part 1

Eleven

as Eleven in Warriors of the Earth: The Symbiote Wars Part 1

Tifa Lockhart

as Tifa Lockhart in Warriors of the Earth: The Symbiote Wars Part 1

The Flash (CW)

as Barry Allen/The Flash in Warriors of the Earth: The Symbiote Wars Part 1

King (The Owl House)

as King in Warriors of the Earth: The Symbiote Wars Part 1

Luigi (The Super Mario Bros. Movie)

as Luigi in Warriors of the Earth: The Symbiote Wars Part 1

Bartman (Bart Simpson)

as Bart Simpson in Warriors of the Earth: The Symbiote Wars Part 1

Ballister Boldheart

as Ballister in Warriors of the Earth: The Symbiote Wars Part 1

Eijiro Kirishima

as Ejrio Kirshima in Warriors of the Earth: The Symbiote Wars Part 1

Atom Smasher

as Albert Rothstein/Atom Smasher in Warriors of the Earth: The Symbiote Wars Part 1

Mordecai and Rigby

as Mordecai & Rigby in Warriors of the Earth: The Symbiote Wars Part 1

Superman (DC Extended Universe)

as Clark Kent/Superman (Snyder) in Warriors of the Earth: The Symbiote Wars Part 1

Hawkman (DCEU)

as Carter Hall/Hawkman in Warriors of the Earth: The Symbiote Wars Part 1

Muscle Man

as Muscle Man in Warriors of the Earth: The Symbiote Wars Part 1

Benson (Regular Show)

as Benson in Warriors of the Earth: The Symbiote Wars Part 1

Ezio Auditore da Firenze

as Enzio in Warriors of the Earth: The Symbiote Wars Part 1