Suggestions by @arnaldocruz

Frank Grillo

as Deadshot in Batman Universe

Score: +7

Oscar Isaac

as Deathstroke in Batman Universe

Score: +3

David Zayas

as Sal Maroni in Batman Universe

Score: +4

John Doman

as Carmine Falcone in Batman Universe

Score: +8

Keanu Reeves

as Black Mask in Batman Universe

Score: -1

Matt Damon

as Hush in Batman Universe

Score: +2

Amanda Seyfried

as Harley Quinn in Batman Universe

Score: -3

Maggie Geha

as Poison Ivy in Batman Universe

Score: +3

Hafþór Júlíus Björnsson

as Bane in Batman Universe

Score: -3

Colin Farrell

as Penguin in Batman Universe

Score: +3

James McAvoy

as The Riddler in Batman Universe

Score: 0

Bill Skarsgård

as Joker in Batman Universe

Score: +19

Leonardo DiCaprio

as Joker in Batman Universe

Score: -2

Blake Lively

as Spoiler in Batman Universe

Score: -4

Aldis Hodge

as Batwing in Batman Universe

Score: +2

Rachel McAdams

as Batwoman in Batman Universe

Score: +4

Katherine McNamara

as Batgirl in Batman Universe

Score: 0

Aidan Gallagher

as Robin in Batman Universe

Score: +14

Ryan Potter

as Red Robin in Batman Universe

Score: 0

Jensen Ackles

as Red Hood in Batman Universe

Score: -6