Even if Oscar Isaac ends up taking the role of Batman, he’s going to have some massive shoes to fill. The DC live-action universe had a solid Bruce Wayne with Ben Affleck’s iteration, which brought something new to the character, unique from the myriad other adaptations. Skipping an origin story, Batman v Superman: Dawn of Justice debuted a Batman who was experienced, jaded, and surprisingly violent. He was arguably the best part of an uneven blockbuster, and comic book fans quickly got on board with Batfleck.
Article source: https://www.cinemablend.com/news/2468674/oscar-isaac-has-a-great-response-to-those-batman-rumors