The Marvel superhero pic tumbled 66 percent in its sophomore outing domestically, compared to a 53 percent drop for DC's 'Superman.'

Universal’s “Jurassic World Rebirth” rounded out the top five with $8.4 million in its fifth weekend of release. The dinosaur epic, which rebooted the long-running property with Scarlett Johansson, Jonathan Bailey and Mahershala Ali, has grossed $317 million in North America and $766 million globally.

Generally speaking, big movies lose a lot of business during the second weekend in theaters. The new Superman had a 53 percent drop in its second weekend in the U.S., and now, Fantastic Four had a 66 percent drop, which is six percent steeper than projections, according to Variety. So, what we're talking about here is six percent.