Can’t remember if they revealed it during the Presents or Worlds but here are the first 2 episodes. It’s about a girl who starts playing Pokemon and makes it to Worlds.
edit: Not sure how to get the video to load in the post.
They’ve shown 6 new cards (1 in the first episode, 5 in the second) which may or may not turn out to be real cards. Lots of old cards and illustrations are featured so it’s plausible these are real.
The Groudon is not the one from Raging Surf as that has 130 HP and this has 160 HP and an ability. Kinda weird to have 2 non-hit Groudons in quick succession if these cards turn out to be real.