When Will the MCU End: Speculation and Future Prospects

The predicted end of the Marvel Cinematic Universe (MCU) is a topic fondly debated by fans. Some believe 2035 might mark the conclusion, with the third saga known as the Annihilation Saga. This timeline assumes the last two Avengers films, titled 'Avengers: Annihilation' and 'Avengers: Ultimatum,' will seal the fate of the current series. The talk around 'Avengers: Secret Wars' being split into two parts could indicate a new chapter prepping to replace the current phase.

Despite this linear progression, it’s important to consider the creative flexibility Marvel has demonstrated. If the current narrative threads begin to falter or lose steam, a creative reboot or a full-scale reset could occur. Rather than ending the MCU, a reboot every couple of years could serve as a platform to introduce new talent in front of and behind the camera. The MCU has successfully tagged onto other franchises and can continue to do so.

The enduring legacy of the MCU can be attributed to its ever-evolving storylines and characters. As the current saga reaches its climax with the defeat of Kang, a new character expected to assume the mantle of Thanos, the interest in the series may naturally ebb. However, Marvel hasn’t scratched the surface of its vast repository of characters. For instance, the Fantastic Four (FF), mutants, and cosmic characters like the Shi'ar could be fascinating additions to the universe.

The future of the MCU looks promising with at least three more cycles of three phases each, extending the timeline to at least 2040. After this, the MCU is likely to undergo a significant reboot. This reboot could introduce new anchor characters and narrative arcs, such as the Fantastic Four, the X-Men, and Avengers members from other Marvel universes. The third phase could feature new cosmic races and potentially revolve around the Annihilation event, one of Marvel's most destructive storylines.

Furthermore, the MCU's ability to retell and reinterpret stories makes it resilient against immediate endings. It can continuously bring new characters and untold stories to the screen. The architecture of each subfranchise ensures that even if interest wanes, there’s always something fresh and exciting to keep fans engaged.

In conclusion, while the final phase of the current MCU may seem imminent, the potential for new iterations and reboots keeps the universe dynamic and alive. As Marvel continues to explore its vast repository of characters and stories, the future of the MCU promises to be anything but stagnant.