Suggestions by @deadboom

Nathan Fillion

as Batman in Batman 60s (Remake)

Score: +3

John Mulaney

as The Joker in Batman 60s (Remake)

Score: +3

Tanner Buchanan

as Robin in Batman 60s (Remake)

Score: +3

Walton Goggins

as The Riddler in Batman 60s (Remake)

Score: +4

Ian Anthony Dale

as Shredder in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +2

Winston Duke

as Bebop in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +3

Nathan Jones

as Rocksteady in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +3

Walton Goggins

as 2020s in Who could’ve played Beetlejuice?

Score: +4

Ariana Greenblatt

as Selena Gomez in Casting More Music Stars Biopics

Score: +1

Giancarlo Esposito

as Dr. Baxter Stockman in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +2

Millie Bobby Brown

as April O'Neil in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +1

Madison Hu

as Karai in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +2

Brian Tyree Henry

as Bebop in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +3

Dave Bautista

as Rocksteady in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +3

Sterling K. Brown

as Dr. Baxter Stockman in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +5

Xolo Maridueña

as Casey Jones in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +5

Joe Taslim

as Shredder in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +4

Sadie Sink

as April O'Neil in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +5

Benedict Wong

as Master Splinter in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +5

Miles Brown

as Michelangelo in Teenage Mutant Ninja Turtles (R-rated Movie)

Score: +5