Note: this is a spoiler-free advance review of Superman: Red Son, which will be released on Digital HD on February 25 and on Blu-ray and 4K Ultra HD Blu-ray on March 17. [poilib element="accentDivider"] DC has an entire brand known as Elseworlds, one that explores the many ways in which tiny changes to history can have huge effects on the stories of iconic heroes like Batman, Superman and Wonder Woman.