Since the pilot is in 3D i would assume thats the idea, but i would like to be certain about it. So, 3D or 2D artwork?
The trailer loaded here was not funded or sponsored in any way by Amazon, as far as I know. Or by us, the writers. It was just someone's idea of what it could look like.
So you probably don't need to follow their lead. Do what you do best.
I should mention here that I am in no way a judge in this or even (as far as I know) going to see the entries. So you don't need to take anything I say as gospel.