Suggestions by @silmarils

Adewale Akinnuoye-Agbaje

as Killer Croc in Robins

Score: +10

Eva Green

as Talia Al Ghul in Robins

Score: -5

Ronda Rousey

as Batgirl in Robins

Score: -9

John Boyega

as Batwing in Robins

Score: +9

Michael Madsen

as Harvey Bullock in Robins

Score: +5

Emma Stone

as Oracle in Robins

Score: 0

William H. Macy

as James Gordon in Robins

Score: -1

Jeremy Irons

as Alfred Pennyworth in Robins

Score: +7

Ben Affleck

as Batman in Robins

Score: +1

Chloë Grace Moretz

as Carrie Kelly in Robins

Score: -8

Asa Butterfield

as Damian Wayne in Robins

Score: -11

AnnaSophia Robb

as Spoiler in Robins

Score: +8

Leo Howard

as Red Robin in Robins

Score: -6

Dylan Minnette

as Red Hood in Robins

Score: -5

Kit Harington

as Dick Grayson in Robins

Score: -10