While I agree that KI won't be getting the record breakers (CF will want to keep Cedar Point as the flagship and major park in Ohio) - I think the rumored Giga at Kings Dominion points to the fact that if another CF park is going to get record breakers, it is likely to be KD as this park has competitive pressure from Six Flags and Busch relatively close.
CF is planning to put KD on top of the East Coast. Even if they do build a gigacoaster, I think it would have to be the best coaster I've ever ridden by far for me to want to go to KD more than Busch Gardens...plus CF already has 2 other parks relatively close to the East Coast, don't they?
I hope that KI still remains as a second franchise park with CF, but with KD clearly in the competition now, who knows what could happen? I mean people say that two thrill rides (one relocated, one new) in three years is a ton for KI, but KD has got a major relocated roller coaster, which in my opinion is better than FH, two relocated family flat rides, and possibly a new gigacoaster next year (which could very well be better than Diamondback, assuming it is executed well), it seems that KD could definitely turn into the secondary flagship park for Cedar Fair.