This is a somewhat depressing AU (as are many more out there …).
Basically, the void did not kill the King in his Palace. Thanks to the small Wyrm still retaining part of his essence of “Higher Being” he could tolerate being consumed by the blackness of the abyss and now inhabits the dream plane with the vestiges of his Palace.
Unfortunately, this experience, along with the stress of everything that happened in the Lore, the King fell into ruin and madness unable to cope with recent events.
Now he is nothing more than a madman who, in the midst of his delusions, is unable to see death and misery around him while being completely ignorant of the hell that is Hallownest in the underworld thanks to The Radiance.
I would like to develop this AU a little further in the future.
