The trailer uses footage, VFX, and editing to imagine a new Harry Potter and the Cursed Child film — but it’s not official. The video features Daniel Radcliffe and Emma Watson (along with implied return of Rupert Grint), and speculates on continuing the saga with a new generation: Albus Potter and beyond. If you like — I can also check for latest official news (as of 2025) on whether a real Cursed Child movie is in production — there’s a lot of speculation, but fewer confirmed facts.