Suggestions by @robertwaynecarroll

Felicity Jones

as Black Cat (Felicia Hardy) in The Amazing Spider-Man 4

J.K. Simmons

as J. Jonah Jameson in The Amazing Spider-Man 4

Chris Zylka

as Flash Thompson (Gets taken over by Symbiote) (Mid-Credits Scene) in The Amazing Spider-Man 4

Stephen Merchant

as The Assessor in The Amazing Spider-Man 4

Javier Bardem

as Otto Octavius (Post-Credits Scene switches him and Peters Bodies) in The Amazing Spider-Man 4

Shailene Woodley

as Mary Jane Watson in The Amazing Spider-Man 4

Rick Pasqualone

as Gizmo (Mikron O'Jeneus) in Suicide Squad

Kevin Conroy

as Batman (Bruce Wayne) (End Of Game Cameo) in Suicide Squad

Mark Rolston

as Deathstroke (Slade Wilson) in Suicide Squad

Vanessa Marshall

as Giganta (Dr. Doris Zeul) in Suicide Squad

Lisa Edelstein

as Mercy Graves in Suicide Squad

C. Thomas Howell

as Captain Cold (Leonard Snart) in Suicide Squad

Frank Grillo

as Rick Flag Sr. in Suicide Squad

Hynden Walch

as Starfire (Koriand'r) in Suicide Squad

Erica Luttrell

as Cheetah (Barbara Ann Minerva) in Suicide Squad

Charles Halford

as Gorilla Grodd in Suicide Squad

Omono Okojie

as Hack (Zalika) in Suicide Squad

John Boyega

as Superman (Calvin Ellis Earth 2) (Kalel) (Post-Credits Scene) in Suicide Squad

Kevin Conroy

as Green Lantern (Bruce Wayne Earth 2) (Post-Credits Scene) in Suicide Squad

Martin Jarvis

as BATMAN (Alfred Pennyworth Earth 2) (Post-Credits Scene) in Suicide Squad