Originally Posted by
prepmaster
Bane at his worst is a guy that can give Batman a physical challenge, at his best is the guy that can plan against Batman and has other villains work under his command. The guy grew up in a prison and became a king in there. He became a figure to be feared in that prison. Bane wants to rule over others the same way he ruled over the criminals in that prison. Scarecrow would not survive the same thing that Bane went through. Scarecrow without his fear gas is not gonna become the most feared figure in a prison.
You can see why Nolan with his grounded take on Batman used Bane as the main villain while relegated Scarecrow to just being a side villain.