The Fantastic Four make their introductions with the leaders of Wakanda in the latest teaser trailer for Marvel Studios‘ Avengers: Doomsday. Disney is set to release directors Anthony Russo and Joe Russo‘s feature theatrically on Dec. 18. The film will include a lengthy list of Marvel superheroes facing off against Doctor Doom, played by returning Marvel Cinematic Universe stalwart Robert Downey Jr. The movie’s footage was released online Tuesday and features voiceover from Shuri (Letitia Wright), who took up the mantle of Black Panther in 2022’s Wakanda Forever following the death of brother T’Challa (Chadwick Boseman). “I’ve lost everyone that matters to me,” Wright says in the new trailer. “A king has his duties to prepare our people for the afterlife. I have mine.” The teaser also shows M’Baku (Winston Duke) introducing himself as the King of Wakanda, after Shuri opted not to challenge him for the throne in Wakanda Forever. That film also included the MCU debut of Namor (Tenoch Huerta), who appears in the trailer for Avengers: Doomsday. “King M’Baku of Wakanda,” Duke …