I will continue to update this as I get time but here's a preliminary of it. 2 categories ATM. Draenor-inspired armor and weapons based off the story, and savage armor and weapons. Only listing stuff which is still obtainable and can be transmogged. I'd mog rules change I'll update.
Will also update with suggestions people provide.
Weapons and armor of those who are defending Draenor:
http://www.wowhead.com/item=32235 (cursed vision of Sargeras) while having nothing to do with the current storyline as we know, how can one exclude this?
http://www.wowhead.com/item=32828 (Ogr'ila tabard) while the faction may or may not exist, there will be plenty of Ogres in Draenor. Show your solidarity with an Ogre tabard
http://www.wowhead.com/transmog-set=1221 (time lord's Mage tier) I get this will get some people to cringe with the alternate universe thing for WoD, but it does fit.
Savage looking weapons and armor (without a direct WoD connection but fits the theme):
http://www.wowhead.com/item=78878 (spine of the thousand cuts) this one isn't too bad to farm, the Dragon Soul trash is easy enough to solo with any class/gear combo.
http://www.wowhead.com/transmog-set=1295 (gate shattering battle plate mog set) many warrior transmog sets are quite savage, but this crafted set (and its recolors) may be passed over. Definitely gives a gladiator feel.
http://www.wowhead.com/item=94740 (jalak's Maelstrom Staff) while there may not be many dinosaurs in Draenor, nothing screams like a dinosaur staff. ToT normal mode pugs are easy enough to get for casters who can't get this in LFR.
http://www.wowhead.com/item=105103 (SoO dagger) LFR and flex versions only available to rogues due to personal loot. Normal/heroic available to anyone.
http://www.wowhead.com/transmog-set=1396 (malevolent monk armor) not many savage leather sets which aren't class specific, best I could find for monks. Though I do love it.
http://www.wowhead.com/transmog-set=1728 (SoO Mage look-alike) had a hard time finding savage cloth armor (probably because I don't play clothies), this set fights the Iron Horde's industrial might with industry.