Next one in line takes the power, wouldn't even be so strange if the next in line did something to cause this situation or just, and this is totally possible, makes him disappear now that he is no longer in charge, at least for now and if the news are right. Also we know that sometime this kind of news are just propaganda, I wouldn't be surprised if he reappears in the next few days (I guess a lot of people remembers how many times Bin Laden or the ISIS leader has been sold as dead just to reappear some time later in a new video).