*sigh* Not a dribbling fan, of books or the TV (have limited exposure to both), but I've never been short of ideas when there's a call for it. 
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1. Heraldic stuff (shields, flags, etc) of all the main Houses and possibly some of the faiths.
2. The ancient trees with faces - Heart trees, I think.
3. Models of White Walkers (tall, slender, wight-like things with glowing blue eyes), Children of the Forest (small elfin creatures - a cross between hobbits, elves and pixies, from what I gathered), perhaps Jon Snow's white dire wolf. Also possibly some specific characters, Tyrion (a handsome blonde human dwarf), Danearis (a young human female with white hair and violet eyes, dressed in 'eastern' fashion), Jon Snow (a black-haired handsome young human clad in black), Arya Stark (a young-ish (10-11) girl dressed as a boy) & possibly others.
4. Specific weapons - the Needle and Longclaw, blade weapons form obsidian perhaps some others.
Dragon eggs we already have, I think.
5. A 3-eyed raven and also possibly ravens that can fly, land, and sit on a character's arm (will probably be an anim/clothing option or something).
I'll try to think of more, but will have to brush up on GoT lore a bit.
