Handfuls of people have two of the nine pieces you're talking about. Plenty of videos, screenshots, and posts about the Twilight Garrison and ATS-Tarantella Titan and Hunter chest pieces. Very rare drop rate (supposedly glitch that they dropped early), and most likely part of time gated releases designed to keep the game fresh. You still might be able to obtain these exotics or even the others via 3 of coins engrams if lucky. People on both consoles possess them. Proof on reddit, YouTube, various forms, etc... My guess is that the challenge bounties/missions for the normal and heroic King's Fall raids will mark the first mass appearances of these 9 missing exotics. So the "several weeks" that were mentioned in one of the recent Bungie updates might mean late November to mid December?. Three new raid emblems, three calcified fragments (technically 4 if your include "insight" from the Darkness tab in grimoire), three sets of exotic armor for each of the three classes... Desperately hoping to acquire the [b][u][i]Twilight Garrison[/i][/u][/b] myself soon. Alot surrounding the number 3 coming soon...

It's hidden behind a vex timegate.