LogFAQs > #961715071

https://www.youtube.com/watch?v=ERAhGia6azE

Doesn't show any new Pokemon or Hisuian forms. It's just a basic overview of the gameplay loop using in-game footage.

Also this video doesn't show it, so if you haven't been following along, this game does actually have a story. The noble Pokemon and their wardens seem pretty similar to the trial captains and totems from Sun/Moon, so there will be some progression of going from one to the next. You're also trying to solve the mystery of why some Pokemon are going berserk, and there is of course plot stuff involving legendaries that's been kept completely quiet so far. All we really know is there are two different clans (Diamond and Pearl clans) who have their different opinions on who the creator of Hisui is, and presumably that'll be a large focus of the story too.