**Jessica Chastain’s star power and the Blumhouse-Atomic Monster-James Wan pedigree are anchoring trader interest in Other Mommy’s domestic opening, yet the market’s tight clustering between the 21-24m, 27-30m and 30-33m brackets reflects uncertainty typical of mid-budget horror releases.** The October 9 date positions the film in a favorable seasonal window for genre titles, while trailers have generated solid social engagement and the source novel by Josh Malerman adds built-in awareness. Differentiating factors include Chastain’s dual-role appeal versus the modest scale of most Blumhouse successes, Rob Savage’s genre credentials, and the absence of major competing wide releases that weekend. With no reviews or presale data locked in yet, traders are weighing historical October horror benchmarks and the film’s R-rated tone against the risk of variable audience turnout in a crowded fall slate.