Much like everyone else, I'm excited for the Explorers since we don't know anything about them, like who the other members are or what are their goals.
I liked that we have finished with this prologue of the story and I'm eager to know the structure that the story is going to have from now on. At least, I love the Volteccers so one way or another, I'm going to enjoy their journeys and I want to have some character-focussed episodes for each of them later on.
As for the Explorers, I wasn't expecting them to have more members so soon. I'm glad because Amethio's group pursuing the Volteccers was starting to become repetitive very soon, as much as I like that trio. Now it seems that he wants to go in pursuit of the shiny Rayquaza to know what happened, which makes me think it's going to be similar to what they did with Zuko in Avatar TLA where we'll get sometimes a few minutes to see what they're doing, and they may get some development even if they apart from the main protagonists.
I really hope that's the case because I feel like Amethio has a lot of potential as a character, and as others say, he could end up becoming an ally depending on what happens.
With that VA choice, Gibeon better be a great mastermind of a boss lol