Disney released a new trailer for the “Willow” Disney+ series at D23 on Saturday, offering a closer look at the continuation of the fantasy story and revealing that Christian Slater has joined the cast.The film is a continuation of the 1988 film directed by Ron Howard, which followed an aspiring magician (Warwick Davis) from a Nelwyn village and an infant girl destined to unite the realms, who together helped destroy an evil queen and banish the forces of darkness. Now, in a magical world where brownies, sorcerers, trolls, and other mystical creatures flourish, the adventure continues, as an unlikely group of heroes set off on a dangerous quest to places far beyond their home, where they must face their inner demons and come together to save their world.“I love the fantasy, the sci-fi, getting to be a part of this show was, I’ll be honest with you, an absolute dream come true,” Slater said on the D23 stage. “Getting to work with [Warwick] was great.