That appears to be the slip cover of the release with the ... with a signed letter from John Carver himself. Thanksgiving already had a standard Blu-ray release earlier this year.

Thanksgiving is available on Ultra HD Blu-ray with a Dolby Atmos or a 7.1 Dolby TrueHD audio presentation if Atmos is not supported. This review will cover the Blu-ray’s Dolby Atmos mix.

After a Black Friday riot ends in tragedy, a mysterious Thanksgiving-inspired killer ... Galore Commentary with Eli Roth and Jeff Rendell Blu-ray™: 1080p High Definition / 2.39:1 • Audio ...