No one mentions anything about new weapons models from Patch 5.2
You can look the screenshots of the Weapon models Here: Source
Still I did the video for people that love to sit and watch...
Season 13 Weapon Arsenal - There are four colors of the weapons. I just did Alliance and Horde color, on screenshots you can check the other colors tho. We will know more about this alliance / horde coloring from GC Soon I hope.
Throne of Thunder PvE Weapon Arsenal - looks finished for me, nothing is missing like for PvP Weapons, but I found them like merged AQ40 and Titan Weapons. Those weapons really look nice.