OP-17 Spoiler Season: Treasure Rares, a Mystery Sixth Leader, and What's Still to Come

With The World's Strongest Warriors dropping on 28 August in English, the OP-17 spoiler season is deep into its active window — and there is still a huge amount left to reveal. Five of the six leaders are officially confirmed, a brand-new rarity has been teased, and only a fraction of the 135-card set has been shown to the public. If you are planning your pre-order or simply trying to follow along, here is where things stand.

The Confirmed Leaders — and the One That Isn't

Bandai has officially revealed five of OP-17's six leaders through its own card-reveal videos. Edward Newgate (Red), Monkey D. Luffy (Black), Shanks (Green, card number OP17-022), Kaido (Purple), and Charlotte Linlin — Big Mom — (Yellow) are all confirmed. That leaves one colour slot open, and as of late July the sixth leader has not been officially announced.

The five confirmed leaders already paint a clear picture of the set's theme: this is a Yonko set, built around the Four Emperors and tied to the current Elbaf arc in the manga. Giant Warriors from Elbaf appear alongside those iconic characters, making OP-17 one of the most thematically cohesive anniversary boosters the game has produced.

Loki and the New SEC Chase Card

Beyond the leaders, the most talked-about reveal so far is a Black Secret Rare (SEC) centred on Loki, the Prince of Elbaf. It is the first confirmed chase card for the set and fits neatly into the Elbaf arc focus. SEC cards in One Piece have consistently driven secondary market interest — OP-13's chase cards are still trading well above retail — so this slot will attract attention from collectors and players alike.

The full card details for Loki's SEC have been circulating through community tracker networks, and it is shaping up to be one of the headline pulls of the set.

The Treasure Rare Slot — Still Open

One of the most intriguing unknowns is the Treasure Rare rarity slot. OP-17 has a confirmed 131 + 4 card count (135 unique cards in total), and the Treasure Rare position exists in the rarity structure — but its identity has not been officially revealed. Given how much collector appetite surrounds the highest-rarity slots in anniversary sets, this is likely being saved for a significant reveal closer to release.

With Bandai's structured preview campaign still in progress roughly five weeks before the Japan launch, the majority of OP-17's cards — including most characters, events, and stadiums — remain unseen.

Release Dates to Know

The key dates for UK collectors are straightforward. Japan releases on 22 August 2026. The US pre-release weekend follows on 21 August, with the English-language wide release on 28 August 2026 — the same week, which represents the near-simultaneous global launch Bandai introduced with this set.

This simultaneous launch removes the import window that used to let collectors pick up Japanese copies early and absorb some demand. Everyone worldwide hits the same allocation at the same time, which is worth factoring into any pre-order strategy.

What to Watch For

The coming weeks should bring the lion's share of official reveals: the sixth leader, the Treasure Rare identity, and the bulk of the non-leader character cards. Bandai has typically accelerated its reveal pace in the final three to four weeks before a Japanese release, so expect a steady stream of new cards through August.

For UK collectors, it is worth securing pre-orders sooner rather than later. Anniversary sets carry outsized demand, and OP-17's global simultaneous launch means stock will be contested everywhere at once. TCG Listing will keep singles and sealed listings updated as the full card list comes into focus — keep an eye on the site as the August window approaches.