**Trader sentiment for Whalefall’s opening weekend heavily favors the sub-$8 million outcome at 65.5% implied probability, reflecting cautious pre-release tracking amid stiff competition.** Industry forecasts from Boxoffice Pro and similar outlets peg the 20th Century Studios survival thriller at a modest $10–15 million domestic debut on October 16, citing its high-concept premise—a scuba diver swallowed by a sperm whale—and solid but not breakout buzz from recent London screenings and trailers. Positive early reactions highlight Austin Abrams’ lead performance, Brian Duffield’s direction, and visceral effects, yet the film lacks the A-list draw of comparable survival entries like Heart of the Beast and faces direct counterprogramming from Street Fighter’s expected $30–40 million launch. With reviews embargoed until October 14 and limited marketing momentum so far, traders appear to discount upside scenarios above $12 million while pricing in downside risk from the crowded October slate.