The end of AQ is near. Very near.
Wahhabism will, however, keep going...and going....
A good comparison is the Muslim Brotherhood which has been around since the 1920's and bred the likes of Zawahiri and Ramzi Yousef. After years of struggle and limited effectiveness, they had gotten political and joined the Egyptian government as did Hamas, hizb' Allah, the IRA, etc. Once insurgent organizations get political, they get beauracratized and the fighting operations get pushed to the margins.
Leadership likes it's comforts and security.