Why is it with some hits, they have a hard time sticking to the director that helped make a hit in the first place? Same with finishing off a trilogy. I think it's kind of jarring to make a tonal shift in the middle of a story...
Some examples of this:
Patty Jenkins
Scott Derrickson
Kenneth Branagh(Thor)
Jon Favreau
Can you imagine someone else finishing Christopher Nolan's Batman trilogy? Foot, meet banana peel.