The first info came from the Twitter account cardland_bs. Rakuten Japan also opened for pre-order the ST-11 set.
Here is the basic info of this set:
■ Title: Digimon Card Game Start Deck Special Entry Set (ST-11)
■ Model: Trading Card
■ Release Date: 2021 / 11/26 (same release day with BT8 New Hero)
■ Manufacturer: Bandai
[Product description]
■ Product specifications
◇ Set contents
・ 1 set of pre-built decks (54 cards)
・ 2 special memory gauges
・ PR 4 cards/ card case
(C: 8 U: 5 R: 2 SR: 1 PR: 1 Memory gauge: 2 PR card: 4 Card case: 1) (link to original source)