POKEGUARDIAN

Kangaskhan and Smoke Stick have been revealed from S3 Infinity Zone. 

Back in March, we covered that a new trademark was registered by Nintendo / Creatures Inc. / Game Freak:

On May 17, 2020 we have spotted the existence of a new product named Pokémon TCG: September Premium Box. At the time it only contained a placeholder title and release date.

Blaziken and Cheering Y Horn have been revealed from S3 Infinity Zone. The last time we have seen Blaziken was during Dragon Majesty.

We have discovered the existence of Target Exclusive Boltund / Galarian Perrserker Sword & Shield Rebel Clash 1-Pack/Checklane blisters. 

Simisear, Simipour and Simisage have been revealed from S3 Infinity Zone. The last time we saw the Elemental Monkeys was during Burning Shadows.

Klink, Klang and Klinklang have been revealed from S3 Infinity Zone. Klinklang makes it's return in the TCG.

Thievul from Sword & Shield has been revealed, and it's a CoroCoro Ichiban! promo.

Today we have opened the Pikachu & Zekrom-GX version of the Pikachu & Zekrom-GX / Reshiram & Charizard-GX League Battle Decks.

Arctozolt, Relicanth and Rare Fossil have been revealed from S3 Infinity Zone. Arctozolt makes it's debut in the TCG.

Galarian Obstagoon and Turbo Patch have been revealed from S3 Infinity Zone.

After May 22, you will recieve a 099/S-P Detective Pikachu Promo card at Pokémon Center stores and Pokémon Center Online.

Spikemuth and Copperajah have been revealed from S3 Infinity Zone.

Update 13-5-2020 Decklists added. Major info:

The Third main set S3 Infinity Zone has been officially revealed. Infinity Zone will be included in our International August set Darkness Ablaze. 

We have product images for the third Sword & Shield TCG set, Darkness Ablaze. This set will be partially based off the Japanese sets:

We have spotted the existence of Rebel Clash Premium 1 Pack Blisters. These were not listed at official distributors and seem to be available at Target / Walmart stores. Our August 2020 set Darkness Ablaze will have likely the same product in August. 

Update: 7-5-2020: Official Product images added. Confirms the story down below that it's based on the Japanese Family Pokémon Card Game set, as spotted at London ToyFair 2020.