Ryan Reynolds has posted a casting audition room trailer on his YouTube channel. The trailer showcases multiple Pokémon that will make appearances in the movie which will be released on May 10th 2019 in North America. Also confirmed in the trailer was that a Detective Pikachu promo card will be distributed to those that purchase a movie ticket.

YouTube Clip - Casting Detective Pikachu

Source: https://www.youtube.com/watch?v=198gzllaumo