The official Pokémon website has announced that
Pokémon: The First Movie and the first movie short
Pikachu's Vacation will be shown in select Cinemark theaters on Saturday, October 29th, 2016 and Tuesday, November 1st, 2016.
Tickets for both cost $5 USD.
Source:
http://www.pokemon.com/us/pokemon-news/watch-pokemon-the-first-movie-on-the-big-screen/