As the name implies this thread is intended to speculate on the identity of the Primals that we'll fight as we level from 50 to 60 in Heavensward.

The Knights of Round are very strongly hinted at, but who else? We know that one will be completely new, but that is still just two primals. Draconic summons have a high chance of showing up as well as holy-aspected ones like Manduin and Alexander.
Alexander would be epic. Imagine a quest hub attacking you.