Perhaps it is an old prejudice which also leads Thranduil to disapprove of Tauriel when it comes to Legolas. Just a short piece from movie Thranduil's POV, First Age allusions abound. Enjoy!
Maedhros and Maglor hear rumours about the Arkenstone forcing them to travel to Erebor to see the jewel for themselves. (Set in the Lingering series; directly related to "Spite")
After the Battle of Five Armies Thorin, Fili, and Kili are sent to their creator for a quick conversation with Aule before reincarnation. ((My very quick writing just so I could get the thought of my head and onto paper.))