All the "Chekhov's Guns" still out there in GoT

"Chekhov's Gun is a plot device whereby you introduce an item in the first part of your novel that doesn't seem important to the story at the time, but takes on greater significance later on." Source.What are some that GoT has yet to tidy up with any significance?For example:Arya's direwolfSylvio ForelGendryThat magic horn...what else? via /r/television http://ift.tt/2tgo7SG