"Pure Fantasy is a 2025 addition to Britney Spears’ Fantasy line, released to mark the collection’s 20th anniversary" ‐ so says the only official information I found about this release.
Elizabeth Arden were the original license holders for the Britney Spears perfumes, which was then sold to Revlon. Now it seems that another company [Give Back Beauty] has bought the licence. The fragrance had already been produced and had even been released in a few countries, but it was cancelled anyway.
I never saw Pure Fantasy in official retailers in the UK in Febuary when it was annonhed, however you can still buy it today on a British beauty site & there are several British eBay stores with Pure Fantasy for sale, so either I just missed it, or stock was already in the process of being shipped internationally to retailers when the licence was sold...