Musician Steve Lacy inadvertently revealed a closely guarded plot detail from "Spider-Man: Brand New Day" during a red carpet interview at the film's premiere, sparking a backlash from fans on social media. Lacy, whose song "Oh Yeah?" features in the Sony film, was asked which character he was most excited about, with the interviewer explicitly requesting no spoilers, but he named and described Sadie Sink's mystery character regardless, catching the interviewer off guard.

The identity of Sink's role had been deliberately withheld ahead of the film's Friday release, with director Destin Daniel Cretton previously telling Rolling Stone there was "a very real reason" for the secrecy and that he believed fans would understand once they saw the film. Clips of Lacy's remarks spread quickly online, with fans joking about potential repercussions from Marvel Studios president Kevin Feige, though Cretton had already indicated he wasn't overly concerned about spoiler backlash.