While I haven’t read all the posts I have to say so many people are focused on the obvious references in Heavensward... there was another that is already being set up and has been for awhile..

The void. Everyone is expecting to return to the source, to go for Islabard or Garlemald or whatever else. But we have Eden, we have two oracles (who we have no reason to presume can’t cross between the shards <even Y’shtola said she would work on a method for travelling between shards.>) restoring the void or going on an adventure through the shards to learn the truth of the ancients would be fitting leading to a confrontation with both hydaelyn and zodiark.