This image has surfaced online and it appears to be the official cover art for the Justice League blu-ray:
As you can see, there is no mention of an extended cut of the film being offered on the package, but that necessarily mean doesn’t mean that one won’t be released as a separate, alternate edition later on.
Fueled by his restored faith in humanity and inspired by Superman’s selfless act, Bruce Wayne enlists newfound ally Diana Prince to face an even greater threat. Together, Batman and Wonder Woman work quickly to recruit a team to stand against this newly awakened enemy. Despite the formation of an unprecedented league of heroes — Batman, Wonder Woman, Aquaman, Cyborg and the Flash — it may be too late to save the planet from an assault of catastrophic proportions.
Justice League DVD/Blu-ray hits the shelves 03/13/18