Suggestions by @lucasleighton

Holt McCallany

as Ben Grimm in The Fantastic Four

Score: +4

John Krasinski

as Reed Richards in The Fantastic Four

Score: +5

Jada Pinkett Smith

as Eartha Kitt in The Bright Knight

Score: +4

Mark Ruffalo

as Cesar Romero in The Bright Knight

Score: -2

Joseph Gordon-Levitt

as Burgess Meredith in The Bright Knight

Score: -1

Maggie Grace

as Lee Meriwether in The Bright Knight

Score: +1

Olivia Wilde

as Julie Newmar in The Bright Knight

Score: +2

Michael Fassbender

as Frank Gorshin in The Bright Knight

Score: -1

Tye Sheridan

as Burt Ward in The Bright Knight

Score: +4

Joel McHale

as Adam West in The Bright Knight

Score: +3

Aaron Eckhart

as Eobard Thawne in My DC Movieverse (fancast)

Score: -1

Denzel Washington

as Lex Luthor in My DC Movieverse (fancast)

Score: -2

Andre Braugher

as Darkseid in My DC Movieverse (fancast)

Score: +1

Liam Hemsworth

as Arthur Curry in My DC Movieverse (fancast)

Score: +2

Hugh Grant

as Alfred Pennyworth in My DC Movieverse (fancast)

Score: -2

Glen Powell

as Barry Allen in My DC Movieverse (fancast)

Score: -2

Emma Stone

as Poison Ivy in My DC Movieverse (fancast)

Score: -3

Bonnie Piesse

as Beru Lars in Star Wars: A New Hope

Score: 0

Joel Edgerton

as Owen Lars in Star Wars: A New Hope

Score: +1

Cillian Murphy

as Grand Moff Wilhuff Tarkin in Star Wars: A New Hope

Score: +5