Based on the search results, "What the Fanta 2023" refers to a limited edition Fanta flavor that was released in the summer of 2022. The flavor was a mystery, and customers were invited to guess what it was on social media. The flavor was later revealed to be orange cream). However, Fanta has continued to release mystery flavors as part of their "What the Fanta?" campaign. In September 2023, Fanta released a new Halloween-themed mystery flavor that is black in color. The flavor is part of the "What the Fanta?" campaign and has zero sugar. Customers can scan a QR code on the drinks packaging to enter an interactive experience on the Fanta website. A review of the Halloween-themed flavor on YouTube suggests that it is a new flavor and not a re-release of the 2022 mystery flavor.