At the end of the SM137 broadcast on September 1st, 2019, a teaser trailer for a new anime series called "Pocket Monsters" was revealed. A new Twitter account for the series also launched.

YouTube Clip Description

A new Pokémon TV anime series will be broadcast! The title is “Pocket Monster”, the same as when the Pokémon anime broadcasts started in 1997!

In this new series, all the regions of the world that have appeared in the game so far, from the Kanto Region to the Galar Region, are the stage for this adventure! Various Pokémon that live in each region will appear!

More detailed information will be announced on Sunday, September 29th, 2019 at 6pm during the TV Tokyo series television program “Pocket Monsters Sun & Moon”! * Broadcast date and time differ in some areas.

"Pocket Monster" TV anime Latest Series Broadcast and Teaser Video Announcement

"The new "Pocket Monsters" series that was announced today will of course be set in the Galar region from the video games "Pocket Monsters Sword/Shield", which will be released November 15th, but also in all the other regions that have appeared in the video games so far, including the Kanto region from the original "Red/Green" games and the Jouto region from the sequels "Gold/Silver"."

"Thus far, the series has changed its title every time a new video game has been released, but the new series title is going to be the same one it had when it debuted in 1997, "Pocket Monsters".

As this title indicates, while the story will of course be set in the Galar region, the setting of the new "Pocket Monsters" video games "Pocket Monsters Sword/Shield", it will also take place in all the other regions that have appeared in video games so far, including the Kanto region from "Pocket Monsters Red/Green" and the Jouto region from "Pocket Monsters Gold/Silver", and will feature the various Pokémon that live in these regions.

A teaser showing the Pokémon that represents these regions was revealed today as well. It can be seen on the official "Pocket Monsters Sun & Moon" TV Tokyo AniTV website, the official Pokémon Youtube channel, and more!

The "Pocket Monsters" anime made in the Reiwa era is going to be one that can be enjoyed by all generations.

Further details will be revealed during the "Pocket Monsters Sun & Moon" episode that airs on the TV Tokyo Network Sunday September 29th at 6pm! Stay tuned!!"

Source: https://www.famitsu.com/news/201909/01182386.html

YouTube Clip - TV Anime New Series "Pocket Monster" Teaser Trailer

Source: https://www.youtube.com/watch?v=dHyYZtWrTD4