"But no one has been able to explain why it happened so suddenly and so completely. Why female superheroes in particular, after their sensational starts?
We don't understand it either," Gross added.
The box office soft opening coincides with corporate transitions at Warner Bros. Discovery, which is preparing for an acquisition by Paramount Skydance.
Meanwhile, Paramount Pictures saw its comedy release "Jackass: Best and Last" open with $8.4 million from 2,855 domestic theaters.
A24's limited release "The Invite" achieved a high per-screen average of $54,158 across seven screens.
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The micro-budget horror film "Obsession" reached third place with $9.8 million in its seventh weekend, bringing its domestic total to $233.9 million.
