Who's going to blow the lid off of the ugly, dark side of MMA with a vindictive tell-all book? Who will tell about the works, the drugs, the steroids and designer performance enhancing cocktails, the corruption, the behind the scenes shit that fans eat up?
It's going to happen sooner or later. it's almost a race to see which name fighter from the past that's currently hurting financially is going to be the one to spill the beans.
This happens in almost every other sport, but MMA fans have a pro wrestling like need to know behind the scenes stuff, so it'll be a major deal
I'm gonna say Frank Mir
or Quinton
Hasn't Ken Shamrock already tried that? Josh Barnett possibly. 
I think Ken was only willing to go so far and it probably had more to do with his lawsuit.
Jens Pulver already has one book that's loved by fans and has been everywhere in the sport and has done everything. He'd be the ideal guy, but it's probably not his style.
I really feel its gonna be Rampage, no disrespect to the guy, but i think once he leaves fighting for filming he is going to be under a spotlight, and he'll spill all.
ZJJitsu705 - I really feel its gonna be Rampage, no disrespect to the guy, but i think once he leaves fighting for filming he is going to be under a spotlight, and he'll spill all.
I could see him doing WWE before doing a book. He'd have a lot to say
I think Jose Canseco has already been the Jose Canseco of MMA... oh, you meant the steriod thing. Who cares...
Who's Jose Canseco?
Dennis Hallman?
Whoever does it ostricizes themselves pretty heavily from the actively competing MMA community, so I'd say if anybody it's going to be somebody who runs a gym and is getting out of it, is near retirement or already has retired.
An odd suggestion maybe but my gut choice is Pat Militech.
Harold Howard
Jon Jones will rat everyone out.
kingwank - I think Jose Canseco has already been the Jose Canseco of MMA... oh, you meant the steriod thing. Who cares...
steroids, works, corruption....fans care
Ken Shamrock already fits the bill with everything except a book. He thinks steroids should be legal though so I cant see him try to rat out anyone except to try and make Dana White look bad
BJ Penn...he's already wealthy, has been openly anti-PED in the past, has beefed with Dana numerous times, and presumably could care less what his fans/peers think of him.
Only a matter of time imo
It won`t come from a really big name.It will come from a mid to low level fighter.
TTT for leaked sex tapes,wardrobe malfunctions & tell all books.
Jose Canseco could do it 
OnlyTheStrongSurvive - Ken Shamrock already fits the bill with everything except a book. He thinks steroids should be legal though so I cant see him try to rat out anyone except to try and make Dana White look bad
How does Ken fit the bill?
Ken was pretty good about shedding some light on his own struggles. He doesn't seem like the type to publically get into other peoples buisness.
Dennis Hallman almost was on Inside MMA but I believe he retracted his comments.
If there is a lot of money to be made, and after he left the UFC, Chaet would throw everyone under the bus.
Without hesitation.