Suggestions by @ringothedrummer

Bill Murray

as Jim Davis in Insanity, Suffering and Lasagna

Will Arnett

as Steve Lombard in Superman (2005)

Wilford Brimley

as Pa Kent in Superman (2005)

Jennifer Connelly

as Lois Lane in Superman (2005)

Patrick Wilson

as Superman in Superman (2005)

Jeffrey Combs

as Metamorpho in Superman (2005)

Andre Braugher

as Mister Terrific in Superman (2005)

Ewan McGregor

as Lex Luthor in Superman (2005)

Bruce Campbell

as Green Lantern in Superman (2005)

Robin Williams

as Gary in Superman (2005)

Bruce Willis

as Spoiler Character #1 in Superman (2005)

Spoiler

as Spoiler Character #4 in Superman (2005)

Spoiler

as Spoiler Character #3 in Superman (2005)

Spoiler

as Spoiler Character #2 in Superman (2005)

Spoiler

as Spoiler Character #1 in Superman (2005)

Billy Crystal

as Merton McSnurtle in The Flash: Born to Run

David Corenswet

as “How about a race?” in The Flash: Born to Run

Spoiler

as “How about a race?” in The Flash: Born to Run

Laura Dern

as Meet the Garricks! in The Flash: Born to Run

Kyle MacLachlan

as Meet the Garricks! in The Flash: Born to Run