Captain America: Brave New World and Thunderbolts also saw so-so box office returns, with the former earning $415 million globally and the latter taking home $386 million. The lowest-grossing Marvel movie of all time is The Marvels, which just broke even at $206 million globally, with 2012's The Incredible Hulk coming in second at $265 million.

Marvel's first family faltered in its sophomore weekend at the box office, recording a 66% dip in North American theaters.

First Steps is far from a bomb, but its box office performance does raise questions about how Marvel Studios should proceed going forward.