Trader consensus around $35–41 million for Spider-Man: Brand New Day’s fourth weekend reflects the film’s steep but predictable multi-week decay after a record $360 million domestic opening and $70 million third weekend. Strong audience retention and $2 billion global milestones sustain momentum, yet back-to-school timing is already trimming weekday holdover, a factor that historically accelerates drops for summer tentpoles. Market-implied odds cluster tightly because comparable blockbusters typically shed 45–55 percent in this frame, placing most outcomes in a narrow band while leaving room for upside if word-of-mouth spikes over the Labor Day approach. No major new competition has emerged to disrupt the trajectory.