Suggestions by @avp_goat

Jóhannes Haukur Jóhannesson

as Wildman in SGT. Rock

Forrest Goodluck

as Little Sureshot in SGT. Rock

Will Buie Jr.

as Junior in SGT. Rock

Alan Ritchson

as Bulldozer in SGT. Rock

Jovan Adepo

as Jackie Johnson in SGT. Rock

Rainn Wilson

as G.I. Robot in SGT. Rock

Jon Bernthal

as Sgt. Rock in SGT. Rock

Mark Rylance

as Doctor Saul Erdel in The Martian Manhunter

Rachel McAdams

as Diane Meade in The Martian Manhunter

Chukwudi Iwuji

as Ma’alefa’ak in The Martian Manhunter

Lyric Matthews

as K'hym J'onzz in The Martian Manhunter

Sharon Duncan-Brewster

as M'yri'ah J'onzz in The Martian Manhunter

Jon Hamm

as Detective Bradley in The Martian Manhunter

Damon Herriman

as Deacon Blackfire in The Martian Manhunter

Thomas Haden Church

as Commissioner James Gordon in The Martian Manhunter

Professor Zoom / Reverse-Flash (Eobard Thawne)

as "The Big Reveal" in The Flash: Lightning Strikes Twice

Spoiler

as "The Big Reveal" in The Flash: Lightning Strikes Twice

Bryce Dallas Howard

as Iris West-Allen in The Flash: Lightning Strikes Twice

Josh Dallas

as The Flash II in The Flash: Lightning Strikes Twice

Elias Kacavas

as The Flash III in The Flash: Lightning Strikes Twice