Ok I'm gonna knock out a couple of things since like I haven't been on in a while.

So, episode something with Ash getting lost in the forest:

One night, Ash goes into the forest by himself and disappears. However, when morning arrives, he still hasn't returned. Serena, Clemont, Bonnie and the others are worried about him, and then a massive storm suddenly arrives. Serena and the others become so worried they can't just sit there and wait for Ash, so they decide to go search for him. Meanwhile, as the impatient Ash has ended up getting lost in the forest, that other Pokémon that disappeared as well appears before him. Just what is the answer Ash found in the forest...?

We all know that Serena will freak out (never disappointed to see) and this is the episode with him "maturing" and all.

Next up is this petition for Serena to go to the Alola region with Ash.

It's really pointless because episodes for the anime have most likely been planned at this point because episodes are planned long in advance.

So either Pokemon keeps its promise,

They don't keep the promise, or there are completely new main characters.