Ahsoka viewers think the Eye of Sion could be a reference to deep-cut Sith Lord

gamesradar.com:

The first two episodes of Ahsoka are now out on Disney Plus, and they’ve introduced an intriguing new concept called the Eye of Sion. Now, just what that is hasn’t yet been revealed, but one connection to a niche Star Wars character could hold the answer.

Now before we go any further, here’s your spoiler warning, we’ll be discussing details from Ahsoka episodes 1 and 2 below. Make sure you’re caught up before reading any further.

In the second episode of Ahsoka, after Morgan Elsbeth has got her hands on the star map which should lead them directly to Grand Admiral Thrawn, she references the Eye of Sion. "The Eye of Sion is on its way here," she tells Baylan Skoll and his apprentice Shin Hati. "Make sure that everything is ready for its arrival."

Part of that preparation involved Inquisitor Marrok stealing a hyperdrive from a New Republic shipyard. Then, right at the end of the episode, we see the hyperdrive being inserted into a massive structure as Morgan says that this will allow the Eye of Sion to be complete and it will "deliver Grand Admiral Thrawn from his exile in the far galaxy."

Given that Thrawn is across "time and space", it seems quite likely that it could be a portal of some kind or potentially a hugely powerful ship. Either way, it’s not been spelled out yet on the show, but that hasn’t stopped some interesting theories emerging.

In particular, the fact that it shares the same name as a brutal Sith Lord has got tongues wagging. Introduced in the 2004 video game Knights of the Old Republic II: The Sith Lords, Darth Sion is known as the Lord of Pain, and is kind of a zombie Sith. He was killed in the Great Sith War, but rather than dying, he ended up surviving by calling on his pain and essentially becoming