So far, it seems to only be this body shape. I think this bass has the standard pre and pups as the full blown custom jobs. It would make sense though since the bodies will be CnC'd, that pups and pre will be already established. The whole point of this (if I am correct here) is to bring a lower cost Brubaker and get it in the hands of more players. I am not even sure about finishes. I thought Kevin mentioned that even this trans burst might push the budget out, so it could go to solid colors even.
I did ask Kevin about a maple fretboard and he stated that it would raise the cost a bit. So, I am sure if you start adding options, you can quickly get out of the target price point for these.
As always, I could be way off here and Brad is much closer to Kevin and would be able to fill you in more.