Since it's obvious by now that the IFBB will never take the title away from Ronnie as long as he's capable of standing on stage unsupported, the question becomes: under what circumstances will we finally see a new Mr. Olympia?
1) Ronnie decides he wants to spend the remaining 10 years of his life eating something beside plain chicken breasts and retires.
2) While attempting an 800 pound squat for his new video - "Yeah Buddy! Light Weight! Boooo!" - his small intestine is blasted through his sphincter, causing a career-ending injury.
3) In his capacity as an Arlington law enforcement officer, Patrolman Coleman [hey, that rhymes!] is heroically killed in the line of duty while apprehending a 62 year old Mexican woman who is working as a maid without legal immigration papers. He is buried with full honors - although the solemnity of the occasion is marred by the forklift required to lower his casket into the grave.
4) While attempting to complete the People magazine crossword puzzle unassisted, Ronnie's overtaxed brain experiences a massive aneurysm - reducing him to a persistent vegetative state. When the difference is noticed a few weeks later, the state of Texas takes custody and prohibits him from further athletic competition.
5) Craig Titus breaks out of jail, zaps Ronnie repeatedly with a Taser gun, and then sets him on fire before being re-apprehended.