The Transmaniacon

In the wastelands of Algol the roar of Fusion Cycles can sometimes be heard...the ominous harbinger of The Transmaniacon, a gang of bikers sorcerers from an alternate Earth who serve the Lords of Change.
Clad in filthy, worn leathers and denims, arms covered in blotchy tattoos, with big steel knives on their belts or in their boots and with a lust for intoxicants and violence, the Transmanicon are rightly feared by the travelers of Algol. Their symbol, prominently featured on their vests and skin, is the the ancient Greek symbol for Kronos/Saturn.
The Transmaniacon have been raiding the wastelands for centuries and some claim that their Fusion Cycles are capable of traveling through the Outer Dark to other planes, dimensions and universes.
Although they have no known headquarters on Algol, being nomadic in nature, it is said that they have a clubhouse in the extradimensional city (and hub of the interdimensional intoxicant trade) Interzone.
In addition to their expected weaponry of knives, chains, crude clubs, firearms and the like, they are said to possess technology to release repressed rage in others. Ther are whispers that they are associated with an especially dangerous avatar of Nyarlathotep known as Flagg or the Walking Dude. It is also said that they possess an obscure translation of the Necronomicon.

Carcosa and "The King in Yellow"

I'm a story and a half into The King in Yellow, having already read The Yellow Sign in an anthology, and already my imagination fevered with unspeakable visions and unwholesome inspirations.

I've already been tossing around this idea of the setting presented in Supplement V: Carcosa being a post-"Call of Cthulhu"-apocalypse setting. The investigators all died or went mad, the stars were right, Nyarlathotep does his Randall Flagg routine and pre-maddens the population before Cthulhu rises and utterly destroys humanity's works and minds. The blasphemous prehuman races run wild on an utterly reshaped planet and eventually, millions of years later, Earth is now Carcosa.

While reading The Repairer of Reputations this idea emerges that Carcosa is this parallel reality, located in "The Abyss," "Outside," "The Outer Dark," what have you. And it's trying to pull Earth into it. Trying to bring about a reality-shattering apocalypse. I'm coming around to the idea of the King in Yellow being an aspect of Nyarlathotep, with the spreading madness and all (admittedly that is par for the course with pretty much any one of the sanity-blasting Mythos big-boys) and I'm never been that fond of Hastur.

Does Leng serve as a gate between our Earth and Carcosa? The High Priest Not to Be Described appears to very much resemble The King in Yellow.