I haven't watched or followed ROH since around late 2005 but i'm pretty sure they have already done Hammerstein as long ago as their 1st anniversary show?
Sorry meant to type "every time" after it.
TNA need to poach Nigel McGuinness, The Age of the Fall crew, Bryan Danielson, and Larry Sweeney soon.
I'd gun for Hero, Delirious, and a return of Strong/Aries as well.
Add to that the Briscoes, and perhaps the Vulture Squad for the X Division and TNA would definitly be making inroads into the direction their product should be put forward. Imagine this for a card:
TNA World Heavyweight Championship
Samoa Joe (c) v Nigel McGuiness
Kurt Angle v Bryan Danielson
Christian Cage & AJ Styles v Jimmy Jacobs & Tyler Black
Abyss v Necro Butcher
TNA World X Division Championship
Petey Williams v Kaz v JigSaw v Ruckus
TNA World Tag Team Championships
Latin American Xchange v The Briscoes v Motor City Machine Guns
Austin Aries v Jay Lethal
X Division Showcase
Sonjay Dutt v Roderick Strong v Rocky Romero v Consequences Creed v Jack Evans v Delirious
TNA Womans Championship
Awesome Kong v Gail Kim v Daizee Haze