Re: For how long will the MCU go?
It is contingent on the success of the films; from the perspective as a fan and screenwriter, rebooting is unfathomable at this point. If anything, the MCU has just gotten started, and they have pierced only the top of the proverbial iceberg, in terms of arcs and storytelling.
"Johnny Storm's a good-hearted kid, sure, but he has the attention span of a toaster, and he leads with his face; in Johnny's undisciplined mind, there's only a single synapse between thinking and doing. The Avengers' battle cry is "Avengers Assemble"; the Fantastic Four's is "Johnny, WAIT!"----Mark Waid