So they just gave the title and showed the cover mock-ups; no specific info till Monday?
What format is this announcement coming in tomorrow? Written? Video? Greg Tito is involved so video...?
Went scouring around the DMG and the Blood War isn't even mentioned by name there in the description of the lower planes. What it does say is that now that Baator and the Abyss are accessible via the river Styx, the demonic forces can invade Avernus again, but the wording seems to indicate they haven't. Likewise the description of Avernus makes it sound like a battlefield of the past not a battlefield in an ongoing conflict. FR wiki also makes no mention of the conflict reigniting. I get that Sundering restored a lot of cosmology back to how it was, but there seem to be some remnants left behind.
As for people mentioning why the other gods had not ended the conflict the way Asmodeus did, the answer is simple - they had no vested interest in doing so. If anything, forces of good were helping fuel the conflict to keep either of two sides from turning on them (although again I don't recall any shift in the lore indicating an attack on the upper planes following the end of the Blood War so perhaps their fears were unfounded) and there weren't any major deities in the Abyss when it was cast into Elemental Chaos - Lolth straight up took Demonweb Pits and relocated it if I recall. Unless I'm mistaken other evil deities resided in other planes.
I can’t see the image clearly but who else is in the special edition cover? Besides Drizzt I mean.
PResumably Mordenkainen?