Alright so Hoodoom and Dragonsbane are the only ornaments coming to Festival of the Lost.
White Witch, Steel Witch, Rose of Acid, and Rose of Corruption are coming this winter and TLW and Black Spindle are getting ornaments before 2017.
Everything but the Emotes will be available for free through Treasures of the Lost acquired from festive quests. Unknown if Hoodoom and Dragonsbane will remain Festival of the Lost exclusive or not.
Silver Dust is now rewarded from dismantling Iron Banner gear from Dusty Engrams(Which are also obtainable as rewards from Iron Banner matches), and Silver Dust requirement has been removed from Days of Iron, Trials, and WotM raid gear.
EDIT:
Candlelight, Sea of Tears, and Unquiet Spirit are new shaders found from Strike Hoards, Gifts of the Lost, and Crucible respectively.
TYRA QUEST:
New emblems as well! One is rewarded upon completing a quest from Tyra Karn that also gives you the Saladin Mask.
-You must approach Saladin in an attempt to impress him with your mask.
-Speak to Tyra Karn.
-Kill 50 enemies with Solar abilities and 25 with the Iron Battleaxe while wearing the Saladin Mask.
-Return to Tyra Karn.
-Rewarded with the Frame's Honor emblem. Quest Completed.
EVA QUEST:
Eva gives you a empty sack to fill with treats! Speak to: Speaker, Cryptarch, Eris, Shaxx, Zavala, Cayde, and Ikora then return to Eva.
-Rewarded with an Uncommon Engram Mask.
-Kill 50 enemies in Crucible while wearing an Engram mask.
-Return to Eva, rewarded with the Tiger Mask.
-Complete 3 Public Events while wearing the Tiger Mask, loot 10 Engrams while wearing the Cryptarch Mask.
ASCENDANT RAISINS:
After receiving Raisins from Eris, you can turn them into Ascendant Raisins at the Speaker. Or you can use your old Raisins from Year 2!
-Turn Ascendant Raisins in to Zavala for Salty Sweets.
-Turn Salty Sweets in to Cryptarch for Winged Candy.
-Turn Winged Candy in to Amanda Holliday(Shipwright) for Splice Drops.
-Turn Splice Drops in to Cayde-6 for Unchocolate.
-Turn Unchocolate in to Eris and receive the the Superblack shader and Wilted Celery!