Complex sentence: Dawn of Justice will be the first live-action film to feature both Batman and Superman, as well as the first theatrical film to feature live-action portrayals of Wonder Woman, Aquaman, and Cyborg.
Split into simpler sentences: Dawn of Justice will be the first live-action film to feature both Batman. It will also feature Superman, as well as the first theatrical film to feature live-action portrayals of Wonder Woman, Aquaman, and Cyborg.