Something along these lines has been in the works for a little over three years now. The original concept was a sort of manufacturers' cup series. Factories would be encouraged to offer contingency and limited sponsorship support to privateers. ADBA & AHDRA were approached with draft proposals (rules, classes, tech specs, etc.) but all the sanctioning bodies expected a finacial commitment - up front. Significant disagreement at the factory rep level doomed those efforts.
I'm pleased to see that AMA and Yamaha could make this happen. As I recall, the proposed classes were to be for 45-55 degree (pushrod) V-twins (2000cc or less displacement limit) and a class for 90 degree (OHC) L-twins (1500cc or less); street legal configuration, self starters, gasoline only, no wheelie bars, and street tires. No elasped time (ET) brackets, just race to win! and both standard and pro trees (finals). At the end of the season, the manufacturer whose product was most often in the winner's circle would be awarded the manufacturers' cup for that year. Riders would amass points (AMA rules) toward the championship.
In retrospect, since Yamaha does not yet offer a 90 degree L-twin, I doubt anything but the 45-55 degree V-twins will be legal for competition. I wonder how Aprilla would fit in (60 degree V-twin)?
Incidently, the marketing gurus feel this concept (drag racing) is very likely an extremely popular (and profitable) endeavor; especially in North America... Run/win on Sunday - Sell on Monday!