This is also assuming they don't again find a way for people to use the GameCube style controllers that people will pay them more money for.
There I fixed it.
Short Answer: Don't know, don't care.
Longer Answer: It likely doesn't matter because anyone who considers themselves a pro player, or who is one, is almost certain to have purchased pro controllers.
Improbable Answer I Will Nevertheless Add: This is also assuming they don't again find a way for...