Suggestions by @joemisseri

Ben Affleck

as Producer in The Flash and Green Arrow: Central City is under attack

Score: +1

Andy Muschietti

as Director in The Flash and Green Arrow: Central City is under attack

Score: +1

Winston Duke

as Killer Croc in The Flash and Green Arrow: Central City is under attack

Score: +3

Antony Starr

as Reverse Flash in The Flash and Green Arrow: Central City is under attack

Score: +2

Ross Lynch

as Red Arrow in The Flash and Green Arrow: Central City is under attack

Score: +1

John David Washington

as Green Lantern. in The Flash and Green Arrow: Central City is under attack

Score: +1

Charlie Hunnam

as Green Arrow in The Flash and Green Arrow: Central City is under attack

Score: +2

Andy Samberg

as Plasticman in The Flash and Green Arrow: Central City is under attack

Score: +1

Frank Grillo

as Deadshot in The Flash and Green Arrow: Central City is under attack

Score: +1

Bill Hader

as Weather Wizard in The Flash and Green Arrow: Central City is under attack

Score: +2

Lucas Till

as The Flash in The Flash and Green Arrow: Central City is under attack

Score: +1

James Gunn

as Writer in Superman: Brainiac attacks

Score: +1

James Gunn

as Producer in Superman: Brainiac attacks

Score: +1

James Gunn

as Director in Superman: Brainiac attacks

Score: +1

Hans Zimmer

as Composer in Superman: Brainiac attacks

Score: +1

David Leitch

as Choreographer in Superman: Brainiac attacks

Score: +1

Marisa Tomei

as Martha Kent in Superman: Brainiac attacks

Score: +1

Kevin Costner

as Jonathan Kent in Superman: Brainiac attacks

Score: +1

Tom Welling

as Jor-El in Superman: Brainiac attacks

Score: +1

Calum Worthy

as Jimmy Olsen in Superman: Brainiac attacks

Score: +1