This is exactly what has happened with Secrets of Strixhaven, but now that we're past the initial launch window, we have a good idea of which cards are valuable and which ones are best saved for your bulk pile
If you cut through the text here, you get whenever a nontoken Zombie you control dies, create a Treasure token. This is a hugely abusable line of text, opening up easy Gravecrawler loops
Shortly after the game's release, somebody calculated that it would cost Pokemon TCG Pocket players around $1,500 to complete the Genetic Apex expansion if they were to use real-world money, although the addition of trading since then has thankfully made getting immersive Mew a little easier
Most notable of all are the new Stadiums, which bring a neat new layer of strategy to both deckbuilding and gameplay
Marie can fly through her deck quite easily