Finally. Card system is mostly done. We've got cards, booster packs, each card has rarity + art associated with it, the cards have "variants" which are mostly the same pose but with different expressions. There's also different art for the Booster packs, but currently only one is in the game, so you won't notice. But eventually that's also collectible. You can open the booster packs in the new "gallery" view, and you can browse all the cards that you have unlocked for each character there as well. Still so much missing, but we're 90% there.