I wouldn't be surprised to see them declare the countries that generally align with Islam as the collective "King of the North" and those that generally align with Christendom as the collective "King of the South".
As a side point, ISIS may not give two hoots about JWs, but I suspect the WTS is acutely aware of how violent Muslim extremists can be. In this past week's WT Study article, there was a photo of a JW preaching in what appears to be an Istanbul-like city. The woman in the background was wearing a hijab, but her face was completely out of focus. The man in the background was wearing blue keffiyeh, but his back was completely to the camera, so he too was completely unrecognizable. The WTS has no problem posing a JW model in a Roman collar for a photo, but seem a little less bold posing a JW as a Muslim.