In April, TTB (the Alcohol and Tobacco Tax and Trade Bureau administrators of the AVA rules) announced the establishment of one new AVA (Cape May Peninsula Viticultural Area in New Jersey). To the best of my knowledge, there are no other AVA petitions ahead of Dahlonega Plateau in the queue for establishment.
But, alas, there has been no action to date. Rumor has it that the US Treasury, overlords of the TTB, are continuing with their policy of issuing no new regulations in the spirit of liberating businesses from undue restrictions and rules. No information is available on when a positive change like the Dahlonega Plateau AVA will be established..