Which theatres will be showing upcoming movies?
Alan is right. The entire system is designed to afford theaters high flexibility in booking, to account for unexpected hits (and bombs). Although who’s showing the trailer is a good indicator, it’s still very fluid — sometimes the theater chain will ship trailers to theaters that won’t ever show the movie in question (but another theater in the chain will), and sometimes a trailer is required by the studio to be attached to a particular release, even though the theater may not have made any commitment to show the film being previewed. All of that said, Box Office Mojo’s release schedule indicates that Hitchhiker’s will open on around 3,000 screens that weekend, so I would guess that every one of your local megamultiplexes will have it.