During the Spider-Man: Brand New Day premiere red carpet on 27 July, musician Steve Lacy was specifically instructed to avoid revealing plot details during an interview with streamer Valkyrae. When asked which character he was most excited to see, Lacy identified a character named Jean and described her as a villain with understandable motivations. His comment drew an immediate pause from the interviewer, prompting Lacy to attempt clarification.

The interview clip rapidly spread across social media as viewers attempted to determine which performer might portray this character. Discussion centred on actress Sadie Sink, whose involvement in the production had been carefully protected from public knowledge. The incident generated lighthearted comparisons to actor Tom Holland's tendency to unintentionally disclose Marvel plot points, with social media users joking that perhaps future red carpet interviews ought to avoid soliciting information about unreleased films.