According to IMDB, although in development, Scar: King of the Pride Lands debuts Jason Mamoa from Aquaman and Game of Thrones as the voice of the infamous anti Lion King. He'll do one heck of a Scar in this future film reimagining the legend of The Lion King, like Ben Kingsley in OUAT's current and final season as Scar.
This reimagining of The Lion King focuses on Scar and how he gets his name, how he has become determined to kill Mufasa in order to become king, and his defeat at the claws of Simba. Jason definitely will lend his voice of Scar working with evil hyenas destroying and enslaving the pride lands.
Jeremy Irons (SvB) has outdone himself as the voice of Scar in The Lion King as will Ben Kingsley in OUAT. However, Jason Mamoa shall evilly reign supreme over the Pride Lands for the taking.
Be prepared when Scar: King of the Pride Lands roars into theaters soon.