The MCU's timeline has never been more confusing, but not because of the multiverse. With the back-to-back releases of Spider-Man: No Way Home and Doctor Strange in the Multiverse of Madness, keeping track of all the universes and variants has become complicated, but that might not be the biggest source of confusion for MCU audiences going forwards. Fourteen years after Iron Man, the MCU's impact on pop culture has become such that even the most casual audiences are interested in things like chronology and timeline of events in order to better experience the franchise.
Up until Avengers: Endgame, the MCU watching experience was restricted to theatrical releases, with a few exceptions loosely connected to the franchise, such as the ABC and Netflix's Marvel series (which now may or may not be considered canon). However, after the end of the Infinity Saga and the launch of Disney's streaming platform, the MCU began to include Disney+ shows, causing the number of installments in the franchise to grow exponentially. Each with a different degree of interconnectivity, every Disney+ MCU series is adding new characters and plotlines to the saga.
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With the MCU theatrical releases becoming more regular following a pause due to the pandemic, combined with the release of several shows for Disney+, the chronology in the MCU Phase 4 has become difficult to follow. However, the fact that some shows and movies have had their release dates changed and the connections between certain releases have become weaker is more directly responsible for the MCU's Phase 4 timeline confusing. Originally, there was a logical succession of events in the Infinity Saga
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