Suggestions by @user2447

Jacob Elordi

as Dick Grayson in Batgirl heart of ice

Katherine McNamara

as Barbara Gordon in Batgirl heart of ice

Mark Strong

as Victor Fries in Batgirl heart of ice

Bryan Cranston

as Jim Gordon in Batgirl heart of ice

Emily Skinner

as Thea Queen in Green Arrow

Dacre Montgomery

as Roy Harper in Green Arrow

Suzu Hirose

as Naomi Singh in Green Arrow

Kiernan Shipka

as Mia Dearden in Green Arrow

Dave Franco

as Tommy Merlin in Green Arrow

Nicole Kidman

as Moira Queen in Green Arrow

Daniel Day-Lewis

as Robert Queen in Green Arrow

Common

as John Diggle in Green Arrow

Jurnee Smollett

as Dinah Drake in Green Arrow

Henry Simmons

as Samuel Hackett in Green Arrow

Madeleine Mantock

as Red Dart in Green Arrow

Omari Hardwick

as Ben Turner in Green Arrow

Lucy Liu

as China White in Green Arrow

Charlie Hunnam

as Oliver Queen in Green Arrow

Jordan Fisher

as Benjamin Rubel in Supergirl

Iñaki Godoy

as Gar in Supergirl