Pokémon Ultimate Journeys: The Series Part Two Synopsis said:Ash’s next World Coronation Series battle is against Drasna of the Kalos Elite Four, but first, he visits his friends Clemont and Bonnie! Then, Chloe meets another of Ash’s friends and enters a Pokémon Contest Spectacular with Eevee, and when Ash’s bond with Lucario reminds him of Greninja, he heads back to Kalos for some special training. Meanwhile, Goh faces his final trial missions for Project Mew, and a trek through the Crown Tundra results in a joyous reunion for Lillie’s family. As the Masters Eight Tournament draws near, Ash’s former rival Paul appears—and Ash is eager to battle!
Pokémon Ultimate Journeys: The Series is the final conclusion to Ash and Pikachu's more than 25 year long journey (and yet he doesn't look a day over 10!), but there's still plenty of time to go before we'll see that conclusion in English. This latest batch of new episodes explicitly will not include either the end of the main series, nor the concluding Aim to be a Pokémon Master arc currently airing in Japan. Release dates for those episodes will be announced at a later point in time.