Controller being made for Modern Warfare 2

[matt247]

http://twitter.com/fourzerotwo/status/2746155391

"In a design meeting for a #MW2 controller. Need your advice - Concave or Convex grips for the Analog sticks? Whats your preference and why?"

How many controllers does Activision need to make? Why don't they just buy one of the 3rd party controller makers