New information about Heresy on Bungie net

The trailer for the new Episode has been released and a page for Heresy has also opened on Bungie net with new interesting details on narrative.

The Danger Above
Powered by the Echo of Navigation, the mighty Hive ship once again darkens our skies, dropping mysterious Anchors across the EDZ.

From this small excerpt you can already know the name of the new Echo - Echo of Navigation, and also that the Dreadnought has arrived at the EDZ, which can't be good