Suggestions by @nerdperson

Ebon Moss-Bachrach

as Captain Cold in Gunn's DCU

Score: +5

Katy O'Brian

as Big Barda in Gunn's DCU

Score: +9

Katy O'Brian

as Big Barda in Characters that should have been in the DCEU

Score: +2

Jayne Houdyshell

as Granny Goodness in James Gunn’s Justice League

Score: +2

Cillian Murphy

as Swamp Thing in James Gunn’s Justice League

Score: +1

George MacKay

as Swamp Thing in James Gunn’s Justice League

Score: +1

Mikey Madison

as Harley Quinn in James Gunn’s Justice League

Score: -3

Benicio del Toro

as Vandal Savage in James Gunn’s Justice League

Score: 0

Chris Evans

as Boston Brand in James Gunn’s Justice League

Score: +1

Ebon Moss-Bachrach

as Captain cold in James Gunn’s Justice League

Score: -1

Cameron Monaghan

as The Question in James Gunn’s Justice League

Score: -2

Damian Lewis

as The Question in James Gunn’s Justice League

Score: +4

David Harbour

as Frankenstein in James Gunn’s Justice League

Score: +1

Doug Jones

as DeSaad in James Gunn’s Justice League

Score: +1

George MacKay

as The Flash in James Gunn’s Justice League

Score: -1

Doug Jones

as Desaad in Superman Legacy (2025)

Score: +2

Christian Convery

as Cypher in Xmen MCU cast (Xmen who would be available now)

Score: +1

Roman Griffin Davis

as Cypher in Xmen MCU cast (Xmen who would be available now)

Score: +1

Felix Kammerer

as Nightcrawler in Who should play the MCU X-men, Inhumans, and Fantastic Four?

Score: -1