In the Zeypherite (idk if i spelled it right) lore they were close allies of Glint.
Before she died she laid an egg.
The zephyrite's also collected Glint's body after she died. It was revealed that while dragons do consume magic it is not destroyed. It just becomes a part of them & radiates off of them. (one of the Zephyrite Elementalists said he felt like a Demigod when holding even a small piece of Glint)
Glint has laid many eggs (you can see this in the gw1 mission in the dragon's lair) and one of them hatched during EotN , a baby dragon we helped protect during a mission. Where tho was it said she laid an egg right before she died? don't recall reading about that.
Even if it is time for new heroes, what the heck is going to happen to the ol' Destiny's Edge? And what are they doing these days? Are they just going to be forgotten forever? We didn't even witness their deaths, like with Rurik, or Kormir's ascension, so I assume they're still around... Talking about loose ends...
They'll just return to their old lives. Logan will be once again at hte queen's side as leader opf the seraph, Eir returns to her home in hoelbrak, etc. Kinda the same thing that happened after tehy lost their fight against Kralkatorrik. Although this time on better terms with each other.