As of right now this is still a proposal (an amendment to Title III of ADA)
Dept of Justice is proposing to amend the regulation that implements the requirements of title III of the Americans with Disabilities Act (ADA) to require movie theaters to have the capability to exhibit movies with closed movie captioning and audio description.
The proposed rule does not interfere with a theater owner's choices as to which movies to exhibit. Whenever a theater intends to exhibit a movie that is available with captions and audio description, then the proposed rule would require the theater to acquire and then exhibit that movie with captions and audio description at all scheduled screenings, unless doing so would result in an undue burden or fundamental alteration. If a particular movie is not produced with captions or audio description, then the proposed rule would still allow a theater to exhibit that movie. The rule does not require movie theaters to add captions or audio description to movies that are not otherwise produced or distributed with these features.
Here's the most recent I can find of an update to the comments to the proposed rule (comment period ended at end of 2014)
(If you'll note there's a place at the bottom of the site where you can provide your email to get updates)
And here's the Regulations.gov official site on the rule and it's progress...