"The name Korthia may be a reference to Kur, the ancient Mesopotamian underworld for the Sumerian and Akkadian peoples."
https://wow.gamepedia.com/Korthia#Notes_and_trivia
Tyrande draws inspiration from Enheduanna, a Sumerian Priestess of the Moon:
"Enheduanna is the earliest known poet whose name has been recorded. She was the High Priestess of the goddess Inanna and the moon god Nanna (Sin). She lived in the Sumerian city-state of Ur."
https://en.m.wikipedia.org/wiki/Enheduanna
Do you think we'll see more of her in patch 9.1, at the city of Korthia and, perhaps, more of Elune?
Interesting tidbits about Kur:
"Unlike many other afterlives of the ancient world, in the Sumerian underworld, there was no final judgement of the deceased and the dead were neither punished nor rewarded for their deeds in life." - essentially, what Sylvanas is striving for.
"The ruler of the underworld was the goddess Ereshkigal, who lived in the palace Ganzir, sometimes used as a name for the underworld itself. During the Akkadian Period (c. 2334 – 2154 BC), Ereshkigal's role as the ruler of the underworld was assigned to Nergal, the god of death. The Akkadians attempted to harmonize this dual rulership of the underworld by making Nergal Ereshkigal's husband. Nergal is the deity most often identified as Ereshkigal's husband. He was also associated with forest fires (and identified with the fire-god, Gibil), fevers, plagues, and war. In myths, he causes destruction and devastation." - this could be the case for Zovaal and the Arbiter. She might have been the ruler of the Maw, before the Jailer was.
"The god Namtar acts as Ereshkigal's sukkal, or divine attendant." - we have a race of attendants in Oribos, taking care of the Arbiter.
"The underworld was believed to have seven gates, through which a soul needed to pass." - how many gates are in Oribos?
"Dumuzid, later known by the corrupted form Tammuz, is the ancient Mesopotamian god of shepherds and the primary consort of the goddess Inanna. His sister is the goddess Geshtinanna. In addition to being the god of shepherds, Dumuzid was also an agricultural deity associated with the growth of plants. Ancient Near Eastern peoples associated Dumuzid with the springtime, when the land was fertile and abundant, but, during the summer months, when the land was dry and barren, it was thought that Dumuzid had 'died'. Geshtinanna is a rural agricultural goddess sometimes associated with dream interpretation. She is the sister of Dumuzid, the god of shepherds. Inanna decrees that he and Geshtinanna will alternate places every six months, each spending half the year in the underworld while the other stays in Heaven. While she is in the underworld, Geshtinanna serves as Ereshkigal's scribe." - i thought it might have been the case for Zovaal and the Arbiter, but they aren't the rulers. Maybe, something that has to do with the Winter Queen and her sister.
"The ancient Mesopotamians also believed that the underworld was home to many demons, which are sometimes referred to as 'offspring of arali'. These demons could sometimes leave the underworld and terrorize mortals on earth. One class of demons that were believed to reside in the underworld were known as galla; their primary purpose appears to have been to drag unfortunate mortals back to Kur. They are frequently referenced in magical texts, and some texts describe them as being seven in number." - we know that the Dreadlords are going to make an appearance in Korthia and that we're gonna learn more about them.
https://en.m.wikipedia.org/wiki/Anci...ian_underworld