If and when you give Jax a VGU... [Warning, somewhat long]
Please make sure his in-game model has a bulky physique.
I don't mean eggplant shaped. If you look at Jax's splash work, you can see he's not a slim guy, though. He's muscular, but not lean. Broad at the shoulder, broad at the waist, broad at the hips. He's less form and more function in his body type. He's clearly a big guy.
http://cdn.leagueoflegends.com/game-info/1.0.15/images/champion/backdrop/bg-jax.jpg
This is important in multiple senses: Jax as a character is not a good looking warrior. Quite the opposite, in fact. Sure, he's a badass looking warrior, but not a dainty, pretty power. He isn't supposed to be a knight in shining armor, like Garen. Jax's strength visibly isn't as graceful in nature, and that's because when you look at Jax, you see from the very beginning that he is powerful in a raw sense. He's bulky. He's confident. He's experienced in his stance. He's confident he can kick ass with a lamppost, for god's sakes! He screams power, and with that power, there is function in his physique.
https://images-cdn.9gag.com/photo/aKzdop6_700b_v3.jpg
Jax is not supposed to be a Mister Universe type. His features are disfigured. His power isn't pretty. So he should have a body type to match. He should be built, mountain man style, though not necessarily tall. He should look dangerous, even through the whimsy of his lamppost.
That's all I have as input. Thanks for making an incredible champion, and keeping him awesome through the years, and keep up the good work, guys!
Edit: I just want to address that even though he is visibly strong does not mean he has to give up being graceful in his fighting style. This model will keep him visibly and stylistically different from Yi and Shen, however, both of whom have a graceful, slim form.