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

Elsewhere at the box office, “Superman” descended to fourth place with $13 million in its fourth weekend of release. The Warner Bros. and DC Studios adaptation has generated $316 million domestically and more than $502.7 million globally to date.

First Steps is entering a critical phase at the box office as it approaches its second weekend. Following a strong $117.6 million opening, the film now faces a projected drop of up to 60%, a key test for its momentum.