Suggestions by @karanjot

Martin Scorsese

as Director in James Bond

Tom Hardy

as Han Solo in Fan Casting All the Star Wars Characters

Scarlett Johansson

as Princess Leia in Fan Casting All the Star Wars Characters

Alexander Skarsgård

as Eddie Brock in The Spectacular Spiderman

Zoë Kravitz

as Gwen stacy in The Spectacular Spiderman

Michael Shannon

as Adrien toomes in The Spectacular Spiderman

Jesse Eisenberg

as Harry Osborn in The Spectacular Spiderman

Nicholas Hoult

as Ned Leeds in The Spectacular Spiderman

Alden Ehrenreich

as Peter Parker in The Spectacular Spiderman

Patrick Wilson

as The Penguin in Batman Fan Cast

Dane DeHaan

as The Riddler in Batman Fan Cast

Jamie Foxx

as Mister Freeze in Batman Fan Cast

Daniel Craig

as James Gordon in Batman Fan Cast

Oscar Isaac

as Two-Face in Batman Fan Cast

Kristen Stewart

as Poison Ivy in Batman Fan Cast