Pokemon Smash has showed a preview of upcoming events:
Plasma-dan is going to appear in the upcoming RD-plot. And is going to substitute Rocket-dan from the series.
I'm going to confirm that is Hikari id going to return to the main cast after the TR plot competing in Contest while Satoshi challenges Cheren, (really Homika and 2 more (SHaga and Shizui). Also, she has rivals confirmed, Nozomi, Haruka, Bel and Corn.
Because Shooti is bad reputation in the fandom, Shinji replaced Shooti for the main rival role. And Kotetsu is going to change into Kyouhei.
Because Daikenki gets more merchandise, ash is going to evolve in Samurott in one episode. The next episode Pochama is going to evolve into Emperte.
Satoshi is going to trqde Kairyu for Tsutarja because Ash need a acceptable Pokemon in the League.