A new trailer for the 20th Pocket Monsters movie
I Choose You! (キミにきめた!) debuted on
Oha Suta on March 2nd, 2017. The trailer was locked in a treasure chest and was teased about until it was finally opened and shown to viewers. The trailer featured Satoshi, Pikachu and Ho-oh and the new logo for the movie which was also was revealed on the show and in a tweet the day before to promote the trailer's debut.
Screenshots from the trailer are available on the Imageboard thread and the
trailer can be viewed on the movie website news article.
Source:
https://twitter.com/ohaohagirl/status/836707534211706880