How can someone be on a list for a car that doesn't exist?
If (and I mean IF) BMW releases this car, it will be like getting the M4 GTS. Only a select, hand picked, group of customers will get it and they will go through an application process. Those customers will be the top customers at the larger BMW dealers. A "list" won't matter much.
All just my opinion but if we can talk about being on a list for a car that likely won't be built, then I can speculate that it will be $125,000US and VERY limited production.
I'm putting my name on my dealer's list just in case I'm wrong