Suggestions by @bighero616

Superman

as Suits/Costumes in Superman: Man of Steel

Atomic Skull

as Suits/Costumes in Task Force X: Project Starfish

KGBeast (Anatoli Knyazev)

as Suits/Costumes in Task Force X: Project Starfish

Giganta

as Suits/Costumes in Task Force X: Project Starfish

Bronze Tiger

as Suits/Costumes in Task Force X: Project Starfish

Livewire

as Suits/Costumes in Task Force X: Project Starfish

Poison Ivy (Pamela Isley)

as Suits/Costumes in Task Force X: Project Starfish

Tatsu Yamashiro (Katana)

as Suits/Costumes in Task Force X: Project Starfish

Killer Croc (Waylon Jones)

as Suits/Costumes in Task Force X: Project Starfish

Deadshot (Floyd Lawton)

as Suits/Costumes in Task Force X: Project Starfish

Rick Flag

as Suits/Costumes in Task Force X: Project Starfish

Spoiler

as Outcome in Task Force X: Project Starfish

Steve Agee

as John Economus in Task Force X: Project Starfish

Jennifer Holland

as Emília Harcourt in Task Force X: Project Starfish

J.K. Simmons

as General Wade Eeling in Task Force X: Project Starfish

Nathan Fillion

as Maxwell Lord in Task Force X: Project Starfish

Iain Glen

as Alan Scott in Task Force X: Project Starfish

Sterling K. Brown

as Martian Manhunter in Task Force X: Project Starfish

Sebastian Stan

as Batman in Task Force X: Project Starfish

Daisy Ridley

as Livewire in Task Force X: Project Starfish