Summary:
- The article reports that the production of the upcoming Marvel Cinematic Universe film "Avengers: Doomsday" is set to begin in spring 2023.
- The film is expected to be a major crossover event that will bring together various characters and storylines from the MCU.
- While details about the plot are scarce, the article suggests that the film will likely have high stakes and significant consequences for the characters and the overall Marvel universe.