The Luke Scott – son of Ridley Scott – directed film is predicted to finish the weekend with $2.3 million, and it was originally expected to make $5-6 million.
The superhero blockbuster is expected to make $13 million, which will push its domestic gross up to $300 million.
Settling for second place this weekend is Suicide Squad, a film that is holding in strong for its fifth week in theaters.
The raunchy comedy will be pushed over the $100 million mark for the four-day holiday weekend.