But these numbers aren't completely random, though sure there isn't necessarily a distinct pattern.Which just goes to show how little correlation box office has with quality. Those top two openings (at the bottom of the list, oddly) are IMHO the two most unwatchably incoherent and terrible movies in the series, at least in their theatrical releases (the director's cut of BvS is considerably better).
I doubt these numbers say much about the movies themselves at all, and more about the vagaries of audience interests as shaped by any number of factors. I mean, surely the opening-day results are the least correlated to the actual merits of a film, since the audience hasn't seen it yet. I don't get the industry's obsession with the first weekend instead of the overall performance over time, which would surely be stronger for a film people wanted to see again and recommend to their friends.
Usually if there is a big opening day, it shows that it is a very anticipated film... but the quality of it will determine if it drops...as well as if a "more important" film opens soon after ... so for example,i think the HUnger Games prequel greatly hurt the Marvels.
It's also interetsing looking at the chart above that Aquaman 1 did about the same opening night at Black Adam... but Black Adam soon tanked while Aquaman made a billion worldwide (and the leading DCFU film).
Also Wonder WOman 1984 was released during Covid AND also on Streaming that same day, The Suicide Squad had Covid, and Blue Beetle had the writers and actors strike in full swing.... so they got hit hugely. And anecdotely, there were at least some theaters in CHicago that had sold out of Aquaman 2
The studios focus on the opening weekend because that's when they get the majority of the money, after that most of it goes to the theaters.
But also, it often sets the tone for the rest of the run. It's a significant number, but not the only one.