As Matthew Vaughn explained to Polygon, Matthew Vaughn and comic book heavyweight Mark Millar came to Warner Bros in 2008 with an idea for a cinematic Superman story that would launch a trilogy which would have been, as Millar once called it, “a massive, uplifting, hopeful thing.” But Vaughn’s Superman movie also would have been incredibly different than what’s come before, as it sees Kal-El growing up on Krypton.
Article source: https://www.cinemablend.com/news/2474239/matthew-vaughn-reveals-his-scrapped-plans-for-man-of-steel-2