Though consistent in their language, WotC cast the idea that Innistrad Double Feature would feature a list of cards chosen from both sets leading both players, vendors and LGSs alike to believe that this would be curated.
That couldn't have been further from the truth.
As we ran up to Innistrad: Crimson Vow's pre-release weekend it was announced that Double Feature would actually be a combined set of all the cards from the previous two Innistrad sets, seemingly leaving everyone flummoxed as what to do. Spend money on a retread of the last two standard sets or allocate funds to the new Standard set, Kamigawa: Neon Dynasty.
We discuss reactions to the news of the lack of curation and both our expectations of and potential handling of this product from the aforementioned perspectives.
Product Overview: https://magic.wizards.com/en/articles/archive/feature/innistrad-double-feature-product-overview-2021-11-15