Expanding on my original notes of how I think he'll look from page 357:
Concerning the design of SSJ God Goku, I wouldn't be surprised if elements were taken from the major villan's apparel.
After all, when Gohan trained with the Z sword, he was dressed to parallel the Kaioshin clothing at the time.
When Goku was on his way back to Earth, he adopted the clothing of the Yardrat's before being sent on his way.
If nothing else, this would place visual cues for viewers that Goku is indeed on par with said God of Destruction.
(I'm starting to think elements of the hand-drawn SSJ5 drawing with "Silver hair" Goku from many years back might actually make an appearance!)
Take the overall apparel style as shown:
Combine it with a potential look (as shown previously in fan-art):
You should potentially end up with a version of this, minus the fur and absurd colors, and a more subtle mane of gold hair:
However, we could be in for a surprise as I'm sure the producers would be aware of the many fan art pieces and may decide to steer away from these completely, or at best, add minimal features from the above as a nod to fans.
(I, for one, would be pleasantly surprised if the final result is nothing even remotely close to what I've portrayed above!)