My take several years ago is alQ = ISIS.
We had the heat on Zawahiri and al Qaeda wanted to move to the next phase of their plan, the caliphate (they expect last phase to be completed in 2020). What better way to do it? Low risk, takes the heat off al Qaeda and low and behold, it worked. In the last few months, I have heard CT guys say ISIS is alQaeda. Interestingly, there are rumblings they will merge again, officially. Bet ya Baghdadi is dead and they want to get everyone together under the kid. And they may say Zawahiri's going to step down, but unless he's dying, I figure he'll say he's stepping down, again to keep the heat off, but stick around as the ideologue and adviser to the kid.
They can run, but they can't hide!