Earlier this summer San Francisco saw the opening of Last Rites, a "Polynesian Noir" tiki-esque bar themed like a plane crashed into a cannibal tribal ground in the jungle.
A few months later, the Future Bars group (Bourbon & Branch, Pagan Idol, etc.) announced they too were doing tiki-but-scary with their concept Zombie Village in the former Tradition spot. Eater reported that the bar would be, "channeling Caribbean island culture with a very tropical interior, and hints of Haitian voodoo."
Today I read about not a dark tiki bar, but a haunted mansion themed bar from the owners of a tiki bar; Shameful Tiki in Vancouver.
It will be called The Dark Manor Inn and the images look like you took the patterned wallpaper and pressed tin ceilings of a speakeasy bar and added Victorian portraits, skulls, and religious artifacts to it.
As someone who believes that Halloween is the best holiday, I am all for this trend, as long as the drinks are still good.