$300M is nearly impossible for March. There won't be as many screens as Star Wars, most people are back in school, and it doesn't have the Disney marketing machine behind it. Star Wars was literally everywhere and didn't top $250M OW, which the stars basically aligned for that to happen. Yes Batman and Superman are huge characters, but their prominence in culture has significantly dwindled as of late. TV shows/ cartoons? Nope. Just Direct to DVD Bat-Family films. could it blow up and surprise everyone like Jurassic World? Sure, but don't expect it to happen.