I'm not a statistician, but it seemed more likely to me looking at the figures after the third weekend. The drop slowed remarkably. It was sitting at $342 million right before Memorial Day Weekend coming up. Yes, Top Gun was definitely and easily going to dominate the field, but Memorial Day is usually a weekend when a lot more people have time off and are able to go see movies. That means during Memorial Day Weekend, it's not just going to be movies like Top Gun getting a boost, but other movies that people might have been putting off seeing for a while as well. During Memorial Day Weekend the top movie gets a nice boost, but usually, a few other movies will get decent boosts as well, even ones that have been out a few weeks.
$342 million meant, with the weekday grosses, plus a holiday weekend coming up, it would be well over $370 million after this weekend. And think about that. Only four weekends and it will already be over $370 million.
That means the movie needs less than $30 million to go to reach the $400 million mark. With Memorial Day Weekend, weekday grosses, plus 3-4 more weekends, it's easily feasible because this is the type of movie where that can happen, a major MCU blockbuster tentpole.
Also, people widely over-estimated this movie being rejected by audiences because of the second weekend drop.
You look at Sonic 2, and Sonic 2 has now surpassed $185 million. $190 million seems very possible now? $200 million less likely. Like I'm not sure it can reach that figure, but I'm positive $400 million will happen now for Multiverse of Madness.