Wasn't just data mined. Bungie stated in an interview (or possibly weekly update haha) that we would get a half dozen new exotic armors for each class.
Many of this missing exotics have also shown up in gameplay trailers, aka advertisements.
English
-
The same people that promised us a raid in HoW but gave us PoE instead....never buying a seasons pass again
-
I'm never PLAYING destiny again
-
Based on your raid completions, I'm not sure you were playing in the first place.
-
Also in the ttk trailer. :)
-
It's in the armory