Probably still out there, but doubt we will see any updates about it until/unless savathun comes back in some way. I remember there being some lore out there from before the collapse with some family that keeps it going to pay a debt to savathun.
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Not saying leaks are true but we may [spoiler]be killing Amaru(sp?) and Vex next season...so I dunno...I think they just wanted to wrap up a major Light/Dark plot line tbh[/spoiler]