For one thing, it follows the same naming schematic as the previous expansions (two-word compound word), and there have been several hints in fiction and in the anniversary event about the color violet, darkness, and an oncoming night. All of that would fit well with the name we’ve seen, but it remains just a rumor until the Fan Festival. Still… if it is the name, don’t be surprised.
Final Fantasy XIV expansion. A trademark filing bot uncovered a new Square-Enix filing for “Shadowbringers,” at around the same interval as similar filings before the reveals of Heavensward and Stormblood (just a couple of months until the Fan Festival). That’s already pretty reliable, but there’s more to it than that.
Source: Gamer Escape