Suggestions by @duel79

Spoiler

as "S.T.A.R. Labs" in DCU Aquaman

Mike Colter

as Black Manta in DCU Aquaman

Alex Pettyfer

as Ocean Master in DCU Aquaman

Uma Thurman

as Atlanna in DCU Aquaman

Mel Gibson

as Thomas Curry in DCU Aquaman

Eleanor Tomlinson

as Mera in DCU Aquaman

Kellan Lutz

as Aquaman in DCU Aquaman

Aramis Knight

as Nightwing in DCU The Flash

Kellan Lutz

as "Man from the Sea" in DCU The Flash

Spoiler

as "Man from the Sea" in DCU The Flash

Hank Azaria

as Abra Kadabra in DCU The Flash

Jodie Foster

as Joan Garrick in DCU The Flash

Tom Hanks

as Jay Garrick in DCU The Flash

Michael C. Hall

as Zoom in DCU The Flash

Bahar Soomekh

as Mary West in DCU The Flash

Amr Waked

as Rudy West in DCU The Flash

Jack Quaid

as Barry Allen in DCU The Flash

Emeraude Toubia

as Iris West Allen in DCU The Flash

London Thor

as Linda Park in DCU The Flash

Eman Esfandi

as The Flash in DCU The Flash