Given the text in the preview it sounds like we will be battling destroyers, seems that the Jormag’s enemy will likely be Primordus.
“An earth shattering finale”. Sounds like Primordus.
“ Dragon minion incursions have thrown once-peaceful lands into chaos, and there’s no predicting where the next attack will erupt.”
Erupting? Sounds like Primordus and Destroyers.
“Tyria is full of people with different loyalties and priorities, but everyone is at risk from an enemy driven only by destruction.”
Sounds like destroyers and Primordus again.