http://i.imgur.com/Co51H.gif
The shot is a bit wonky, but it appears Blizzard has given us hunters something extra. I made it a gif to show the 'bowrelease' animation, which triggers a shot of electricity.
http://i.imgur.com/BwSKW.gif
Same for the gun. It takes a bit longer, but you'll see as long as you keep your eye on it. Personally, I think it could potentially be darn cool, and could give hunter weapons that extra needed flavor. Not sure if it's been done before, but I think it has potential!
http://i.imgur.com/UPU7k.jpg
Zandalari Bow. Pretty cool.

http://i.imgur.com/oLGW3.jpg
Mogu Spear. Nothing special, but I thought it looked pretty rad.
http://i.imgur.com/n3tP5.jpg
A Mogu Sword. WoWhead only had the icon, no idea why, but it looks pretty nice.
http://i.imgur.com/PPvfZ.jpg
The Archaeology Gun was Mantid-themed after all! It looks pretty great!
http://i.imgur.com/RpngY.jpg
Plate wearers rejoice; the way it was named in the files, and with Blizzard hinting at it, you platies are apparently going to be able to wear the crown of the Thunder King, Lei Shen, itself.
BONUS PIC:
This one boggled me, since it hasn't been used in game, as far as I know, but the new Scholomance has been available since MoP. I do remember that an icon was datamined for it, but the icon and this model were apparently never used. I hope Blizzard does so now. How long this has been in the files, I don't know. I sort of hope it's a new patch 5.2 model, so it's still possible that Blizzard will update the model.
http://i.imgur.com/jtZff.jpg