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Kingdom Hearts fans may not be getting Kingdom Hearts 4 any time soon — or the mobile spinoff Missing-Link, which was just canceled — but Square Enix is offering something that might help ease the wait: a massive new official Kingdom Hearts trading card collection. And it comes with a twist.

Revealed this week, the Kingdom Hearts Art Museum card set includes a whopping 228 unique cards, pulling from the entire history of the franchise. With designs spanning early PS2-era nostalgia through to more recent titles, this isn’t just a quick cash-in — it’s a collector’s archive.

Like most modern TCGs, the set features a variety of card tiers. According to Square Enix:

• 93 are standard “normal” cards

• 93 are premium-quality versions

• 18 are classified as “Hearts Rares”

• 18 more fall into the “Hearts Premium Rare” category

• And only 4 are “Kingdom Rares” — presumably the hardest to pull

That brings the total to 226 — which raises the question: what about the other two?

Those final two cards are listed simply as “special cards,” and Square is keeping their artwork hidden for now. No leaks, no teasers, just empty card slots on the official product page. That mystery has fueled fan speculation that these elusive cards may feature content tied to Kingdom Hearts 4 — either characters, key art, or even backdrops that haven’t been revealed publicly yet.

It wouldn’t be the first time Square teased a major KH title through merchandise. Given the set's release date of August 30, 2025, some believe the artwork on the secret cards could hint at KH4 designs set to be revealed closer to or just ahead of that launch.

This comes mere hours after Square finally shared the first new look at KH4 in three years — just enough to stir fan theories, but not enough to answer any real questions. The timing of this card announcement adds fuel to the fire, especially since the cancellation of Missing-Link left fans unsure where the series was headed next.

The Art Museum set, at the very least, shows Square still sees value in the brand. Cards can currently be pre-ordered through Square Enix’s Japanese store, though U.S. collectors may have to wait or import due to ongoing tariff complications. Packs are priced at 550 yen (around $4 USD) and contain six cards each. A full booster box includes 20 packs — that’s 120 cards total — for 11,000 yen (about $77).

Even if the secret cards don’t tie directly into KH4, this is shaping up to be one of the most extensive and artistic Kingdom Hearts merch drops in years. And for longtime fans still holding onto their Keyblades and their theories, it’s one more reason to stay locked in.