Marvel has released the first official trailer for 'Agatha All Along,' a spin-off from WandaVision, showcasing Agatha Harkness on a magical journey to reclaim her powers with a diverse cast. The trailer hints at horror elements and a quest on the legendary Witches' Road. The show, premiering on September 18th on Disney+, is anticipated to provide a fresh take on the MCU TV series, receiving positive early reviews and excitement for Kathryn Hahn's reprisal of her character. Created by Jac Schaeffer, the series promises a mix of mystery and magic, setting a darker tone compared to previous Marvel TV adaptations.