It appears that AMC Theatres will be showing John Wick from info on their site. The appear to be the first theater chain to announce that they will carry the film.
I exchanged tweets with @87elevenAction and they have said the trailer for John Wick will be released soon. It’s not clear what kind of time frame they are talking about when they say soon but October 24 is not that far off so hopefully we are talking days or a week or two.