Which Venom the announcement described
Epic's September 23, 2021 Fortnite announcement introduced an Eddie Brock outfit inspired by Venom: Let There Be Carnage. Its built-in Venom Unleashed emote transformed Brock into the symbiote, while the Venom style could also be selected in the locker. Epic distinguished this movie-inspired version from the existing Venom outfit.
That distinction explains the reference to Tom Hardy's screen character in an old headline. It did not mean the actor was joining a playable match, recording a new film or making a personal appearance for everyone who bought the outfit.
Source [1]Cosmetics and availability
An outfit changes a character's appearance. The launch description also included a Symbiote Scythe pickaxe, but those cosmetic names should not be read as a promise of a permanent competitive advantage. A movie tie-in and the rules of the game remain separate subjects.
The original item-shop announcement establishes the debut, not today's availability or price. Check Fortnite's current shop if considering a purchase. The related Gaiden guide explains a different crossover-style event and why its original dates remain essential when an old promotion resurfaces.
Source [1]