Suggestions by @rafaelnovaiscamposdejesus

Michael Caine

as Alfred Pennyworth (Nolanverse) in The Flash (2022)

Christian Bale

as Bruce Wayne (Nolanverse) in The Flash (2022)

Andy Muschietti

as Director in The Flash (2022)

Joseph Gordon-Levitt

as Batman (Nolanverse) in The Flash (2022)

Alan Silvestri

as Composer in The Flash (2022)

Angelina Jolie

as Poison Ivy in Batman Forever and Batman and Robin

Johnny Depp

as The Riddler in Batman Forever and Batman and Robin

Danny Elfman

as Composer in Batman Forever and Batman and Robin

Sylvester Stallone

as Bane in Batman Forever and Batman and Robin

Kirstie Alley

as Chase Meridian in Batman Forever and Batman and Robin

Sylvester Stallone

as Bane in Batman Unchained (2000)

Danny Elfman

as Composer in Batman Unchained (2000)

Tim Burton

as Director in Batman Unchained (2000)

Bruce Willis

as Mr Freeze in Batman Unchained (2000)

Leonardo DiCaprio

as Robin in Batman Unchained (2000)

Michael Keaton

as Batman in Batman Unchained (2000)

Lorne Balfe

as Composer in The Batman