User blog comment:AustinDR/Avengers: Endgame (Review)/@comment-2059440-20190430151616

time-travel always causes problems to be honest, even in franchises where time-travel is the central focus (Doctor Who etc) - I think Marvel at least does better than most as it says time-travel causes alternate realities to branch out, however for a shared movie verse this will eventually get too complicated for your average audience to enjoy.

especially as in future MCU films they plan on going into multiverse further with cosmic characters and events, which I think could easily get out of hand.. especially if they bring in things like Beyonder (which is almost inevitable).

the Captain Marvel thing is likely due to controversy with her actress (less said about that the better) but she's also due to have more prominence in future MCU anyway, such as facing Adam Warlock.

one big problem MCU will face in future is how to deal with multiverse without alienating the larger audiences, as well as how to avoid MCU relying on too many deus-ex-machinas (as the comics do).