WARNING: This article contains MAJOR SPOILERS for Doctor Strange in the Multiverse of Madness.
Doctor Strange in the Multiverse of Madness screenwriter Michael Waldron explains the film's setup for Secret Wars. Doctor Strange in the Multiverse of Madness served as the culmination of storylines laid out in Phase 4 projects like WandaVision, Loki, and Spider-Man: No Way Home. While it offered some conclusions, it also left the door open with a number of new characters for future MCU stories, and the inclusion of the word «incursions» in regards to the multiverse seems to be laying the groundwork for Marvel's next event, Secret Wars.
Published in 2015,Secret Wars was an epic Marvel event title that paid off years of writer's Jonathan Hickman stories he laid out in his run on titles like Fantastic Four, The Avengers, and New Avengers. The series sees all of the Marvel multiverse destroyed and rebuilt into one single location: Battleworld, a world made up of various pieces from the multiverse under the creation of Doctor Doom. With Phase 4 emphasizing the multiverse, and various references to incursions being laid out in Doctor Strange in the Multiverse of Madness it appears that the MCU is setting up Secret Wars to be the big Avengers: Endgame style event film the franchise is building to.
Related: What Are Incursions? Marvel's New Multiverse Problem Explained
Doctor Strange in the Multiverse of Madness' Waldron revealed in an interview with Gizmodo about the decision to include incursions and what it means for a possible Secret Wars adaptation. Waldron compared it to how Marvel gradually introduced cosmic elements into the MCU first with Thor and the buildup to Thanos and that the reference to incursions is a tease of what
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