Morkus from Orkus
5e opens the door, but doesn't walk through. If YOU put the 4e setting and Dawn War into your game, that's on you. I can tell you that it isn't in the default 5e yet and as such, is not in my game.5e opens the door for the 4e world setting, including its Dawn War between astrals and primordials. It can even be one of the upcoming official settings.
Cool. Then the next time you play 4e, that will be true.4e made the Dark Sun setting part of this Dawn War.
Possibly, or possibly not. There is nothing to say that it is.It appears, Fyreen is likewise part of this Dawn War.
No you don't, because 5e has no Dawn War yet.We have a list of the astrals that participated in this Dawn War.
You can't extend something that doesn't exist.By extension, these same astrals destroyed the crystal sphere relating to Fyreen.
If you can show hard proof that the Dawn War exists, and then more hard proof that what happened in Doomspace is part of it, you can be right about this. Until then, you are assuming a whole lot that has no basis in 5e. 4e cannot be used to prove anything in 5e, and you don't even have that much. You only have lots and lots and lots of assumption based on 4e and some really, really vague stuff in 5e.