Although Zack Snyder and the rest of the crew eventually landed on a suit directly inspired by Frank Miller’s The Dark Knight Returns, they initially toyed with a far more armored and high-tech suit that looked like the Christian Bale’s Dark Knight suit on steroids.
It is certainly a good look for the character, but it is also a serious departure from what we ultimately got.
As you can pretty clearly see from the above tweet, Ben Affleck’s Batman suit from Dawn of Justice underwent some massive evolutions over the course of the film’s development.