Somehow, Bruce Wayne (Ben Affleck) didn’t seem to know about everything that unfolded in Wonder Woman 1984, a movie which saw Diana (Gal Gadot) go up against two major DC Comics villains, Cheetah (Kristin Wiig) and Maxwell Lord (Pedro Pascal). That's despite the future hero being alive (and 12 years old) at the time and going on to become the world's greatest detective (at least in of traditional billing) with a special interest in extraordinary individuals.
The DCEU is getting a new Batman via Robert Pattinson in Justice League. Their connection was also acknowledged in Wonder Woman’s opening scene.
In Batman v. Superman: Dawn of Justice, Wonder Woman told Batman that she walked away from humanity 100 years ago. That’s an odd statement, considering the events that went on in Wonder Woman 1984. Also, it’s not true: She may have avoided personal relationships after World War I, but she did save the world from Max Lord in 1984. Clearly, Batman’s knowledge of history was incorrect. As for how that could be possible, it is important to note that Diana did make a noticeable effort to keep herself out of the public eye. That was evident in the mall scene when she took out the cameras that captured footage of her.
Even so, too much happened during the conflict with Max Lord for her existence to remain such a carefully guarded secret. A massive wall suddenly materialized (and fell apart) in Egypt, missiles were launched, a fight broke out in the White House, and other events occurred as well. It’s hard to imagine that the disaster that Lord nearly caused didn’t garner Bruce Wayne’s attention when he was looking into incidents related to super-powered individuals. With his Dreamstone powers, Lord was granting wishes to people around the world before Wonder Woman reversed the damage he had done by getting everyone to renounce their wishes with her Lasso of Truth. Even if Diana managed to keep her own part in this story from becoming public knowledge, it seems likely that a person with detective skills as well-known as Batman’s would have found out about her role.
After all, Bruce Wayne collected info on other vigilantes and compiled detailed files on their activities. People may not have known much about her, but they were aware at the time of a vigilante operating in Washington D.C. There were onlookers who witnessed her in action at different points in the movie. Wayne should have found out about this person and connected the dots to Wonder Woman. The fact that he didn’t do that is surprising, and could be an indication of a minor plot hole introduced by Wonder Woman 1984. That would make sense, especially when considering that a Wonder Woman movie set in the 1980s wasn’t in the works when Batman v. Superman was in production.
