Suggestions by @dplott

Emily Browning

as Joan in CASTLE

Score: +1

Ray Winstone

as Kingpin (Small Cameo Only) in CASTLE

Score: +1

Jake Busey

as Martin Soap in CASTLE

Score: +1

Cillian Murphy

as Finn Cooley in CASTLE

Score: +1

Stephen Lang

as The Russian in CASTLE

Score: -1

James McAvoy

as Jigsaw in CASTLE

Score: +1

Karl Urban

as Bushwhacker in CASTLE

Score: +1

Jennifer Tilly

as Ma Gnucci (Flashback scene only) in CASTLE

Score: +2

Matt Bomer

as David Lieberman in CASTLE

Score: +1

Joe Manganiello

as Frank Castle in CASTLE

Score: +1

Cara Delevingne

as Harley Quinn in “The Batman” fancast

Score: -8

Dylan Kingwell

as Dr. Langstrom/ The Man-Bat in Batman: Knightfall

Score: +1

Paul Anderson

as The Penguin/Oswald Cobblepot in Batman: Knightfall

Score: 0

Mark Henry

as Killer Croc/Waylon Jones in Batman: Knightfall

Score: +7

Natalie Dormer

as Poison Ivy in Batman: Knightfall

Score: +1

Michael Cerveris

as Professor Pyg in Batman: Knightfall

Score: +2

Gerard Butler

as Death stroke/Slade Wilson in Batman: Knightfall

Score: +3

Cara Delevingne

as Harley Quinn in Batman: Knightfall

Score: 0

Jensen Ackles

as Red Hood/Jason Todd in Batman: Knightfall

Score: +2

Logan Lerman

as Red Robin/Tim Drake in Batman: Knightfall

Score: +2