As someone who is not too familiar with Kang's history in the comics, I have been thinking about how the writers might bring the conflict with Kang to a satisfying conclusion. One idea that I think could work well is drawing inspiration from the TV series DARK, which also deals with complex issues of time, causality, and the consequences of meddling with history.
In DARK, the characters discover the existence of an origin timeline that serves as the source of all other timelines. Without giving away any spoilers, this concept is used in a very interesting and thought-provoking way to bring the story to a close.
I think it would be fascinating if the MCU writers took a similar approach with Kang, revealing the existence of an origin timeline that is the source of all other timelines. This could provide a way for the heroes to break free from the cycle of cause and effect that Kang is perpetuating, and find a solution to the problem that doesn't involve endless time travel or fighting Kang indefinitely.
Of course, there are many different ways that the writers could approach this challenge, but I think the idea of discovering an origin timeline has a lot of potential to create an engaging and thought-provoking story. It would allow the writers to explore the ethical dilemmas of time travel and causality, as well as the complex relationships between the characters as they try to work together to save the multiverse. Overall, I'm really excited to see how the MCU writers will bring the conflict with Kang to a close, and I think drawing inspiration from DARK could be a great way to do it.