Suggestions by @wbb

Jared Leto

as Joker in The Boy Wonder

Score: +1

Ben Affleck

as Batman in The Boy Wonder

Score: 0

Nicholas Hamilton

as Robin in The Boy Wonder

Score: -1

Rupert Gregson-Williams

as Composer in Kamandi: Origins

Score: +1

David Ayer

as Writer in Kamandi: Origins

Score: +4

Charles Roven

as Producer in Kamandi: Origins

Score: +1

David Ayer

as Director in Kamandi: Origins

Score: +4

Samuel L. Jackson

as Tuftan in Kamandi: Origins

Score: +1

Ron Perlman

as Stek in Kamandi: Origins

Score: +1

Mark Hamill

as Fen in Kamandi: Origins

Score: +1

Mark Strong

as Doctor Michael Grant in Kamandi: Origins

Score: +1

Idris Elba

as Great Caesar in Kamandi: Origins

Score: +1

Jeffrey Dean Morgan

as Buddy Blank / O.M.A.C. in Kamandi: Origins

Score: +1

Bryan Cranston

as Professor Myron Forest in Kamandi: Origins

Score: +1

Ty Simpkins

as Kamandi in Kamandi: Origins

Score: +2

Woody Strode

as Harvey Dent in Batman (1977)

Score: -1

G.D. Spradlin

as Carl Grissom in Batman (1977)

Score: +1

Marlon Brando

as Jack Napier / The Joker in Batman (1977)

Score: -2

Teri Garr

as Vicki Vale in Batman (1977)

Score: +1

James Caan

as Bruce Wayne / Batman in Batman (1977)

Score: +2