So how bad would it be if Khorne won and became a part of the Ork pantheon? Would we see stuff like Ork Daemon Princes and Ork Daemon worlds?
While Khorne has not 'won' yet, despite definitely being the happiest they've ever been since they existed, Khorne...
is already a part of the Ork pantheon now. Not as a major figure, but he's part of it now.
Aside from the obvious problems we can all no doubt imagine, this along with the sheer carnage and energy behind this whole war, has caused significant... changes, for lack of a better word.
One such change happened when Khorne very nearly killed off Mork, who was only saved when Gork quickly battered the Blood God away before the finishing blow happened. This caused 'divine inspiration' to reach a load of Oddboys (Meks, Kommandos, Doks etc. etc.) and caused a shift from the Orks all rushing forward to the Warp and fighting anything in their way to rushing forward to the Warp and
ignoring every possible fight.
(I think this also gave Khorne a new trait, which consolidated various traits into one that makes the Blood God outright immune to most forms of damage.)
That's already pretty big, all the Orks in the galaxy deciding to ignore every fight they could to all head to the Warp together, but
then the Twin Orks did something that hasn't happened since the War in Heaven. They made Khorne bleed from a big injury. This made him so happy that he outright just started laughing, which was followed by Gork and Mork laughing too. Which grew and grew and grew.
This laughter rippled across the Warp and the floor for psyker stability across the galaxy has noticeably, albeit very minorly, risen. Every psyker that was borderline safe has either gone mad or exploded. Every single one of them, such as three of the five 'stable' Alpha psykers the Imperium possessed at the time (outside of Astartes) which now only two remain (aside from the Emperor of Mankind and Malcador).
The above ironically will lead to more stable psykers over all, as despite quite a few worlds being lost to the Warp or otherwise had a bad fucking time, there is pretty much no such thing as 'borderline stable'. You're either a stable psyker or you're dead or corrupted, the gap between them is too large now.
This, uh, also had a side effect of nearly
completely destroying Commorragh due to the civil wars shifting towards using psychic slaves and warriors, due several groups using them to horrifically deadly effect. Psykers that also were twisted and tortured and otherwise 'Dark Eldar'd' enough that pretty much every one of them blew up or got corrupted. It was so bad that Khaine's Gate was nearly at risk, i.e. the city's continued existence, but Cegorach saved what is now the 'Ashen City of Commorragh' and rules over it with Vect as the puppet king.
Aside from that, something else major happened. Partly due to them all being in the Warp, partly due to Khorne and his armies of daemons' presence, and I think partly due to Khorne being a member of the pantheon now,
Ork corruption exists. Currently, this only comes into action when someone is near a bunch of Orks and doesn't fight them for whatever reason. It'll turn them more aggressive, more weapon obsessed, and generally just make them more Ork-y and more likely to fight the Orks.
Later, it will become much worse. Such as causing Orks and Ork spores to just appear when you think and know about Orks too much. Or turn you into an actual Ork. Both of which will significantly effect the Eldar, due to how much they really know about them.
The blood of Khorne, Gork and Mork is also gonna cause entirely new, stronger types of Orks to be created out of them. Such as the Black Orcs and Night Goblins in Warhammer Fantasy.
Finally, and I know I'm probably missing a bunch of stuff but this is all I can remember off the top of my head, this Blood and Thunder War has created a whole new type of daemon. An elephantine one, called the Mastodon, that can be either Khornate or
Orkoid and, well, it's not too special, just a new type of beast, but... yeah.
Just had an idea that is both awesome and terrifying in regards to one of the potential outcomes from the BTW. Daemon Warmoons, as in the daemon equivelant of Ork Warmoons. Except in their case they can move around in the materium realm like a normal Warmoon except also having all the qualities/capabilities of a Daemonworld and Warmoon.
Sidenote, this has
also already happened. While not (yet) made by their own hands, the Khornates have... I believe it was at least eight corrupted Attack Moons, along with an Attack Planet in their possession.
We actually saw Horus briefly encounter an Ork Attack Moon fighting a Khornate Attack Moon. To clarify, that was not just a vision, that was real and actually happened.
It's, uh, also possible for those Khornate Attack Moons to just...
appear anywhere they want to. While this is almost fully focused on the Blood and Thunder War, Daemon Hunter did note that if they wanted to they could pop up next to, say, Primarch Homeworlds. Able to project the voice of Khorne itself directly to people.