A potential delay allows for everyone to get some distance from the disappointment of James Gunn being fired, and it’s not like Marvel doesn’t have a lot of characters and films that it can slot in wherever Guardians of the Galaxy Vol. 3 was intended to land.
A delay is probably the best thing for Guardians of the Galaxy Vol. 3.
While I think we are all eager for more Guardians, this is probably the smartest move Marvel and Disney could make.
This gives Marvel time to find the absolute right person for the job; someone who can work with the cast and the material.