Kevin Feige, president of Marvel Studios, has confirmed that the events of "The Fantastic Four: First Steps" will directly lead into the upcoming film "Avengers: Doomsday." The production of "Avengers: Doomsday" is currently underway, with actor Anthony Mackie confirming that filming is still in progress. Feige revealed that some characters from the Fantastic Four universe will appear in "Avengers: Doomsday," and the film is being shot on the same sets built for the Fantastic Four, including the iconic Baxter Building living room and kitchen. The movie will feature interactions between the Avengers and the X-Men, which Feige described as a thrilling and surreal experience given his 25 years with Marvel. Additionally, Anthony Mackie mentioned ongoing friendly conflicts between his character Sam Wilson and Sebastian Stan's Bucky Barnes over the Avengers name, highlighting evolving dynamics during filming. A sequel to the Fantastic Four film is already in development, further expanding the Marvel Cinematic Universe's interconnected storyline.