The Deck List is copied and locked as part of registering for that event
Notably, VSTAR Pokmon cards each have a VSTAR Power, an incredibly potent Attack or Ability that can be used once per game
There's a very minor Card Draw theme with stuff like Syr Elenora, the Discerning and Vodalian Wave-Knight for spice, along with a bit of reanimation set-up like Exsanguinator Cavalry to help discard Knights and Haakon, Stromgald Scourge to get them back, but it's minor enough to be mostly just added resiliency to the deck, not a specific goal
Final Fantasy will feature cards based on every mainline numbered game, up to and including Final Fantasy 16
The announcement video concludes with confirmation that Mega Dragonite is coming to the Pokemon TCG soon
When Wormfang Crab enters the battlefield, an opponent chooses a permanent you control other than Wormfang Crab and exiles it