That is exactly why I went ahead and pulled the trigger on a new MS 75D. The pricing is pretty damn close. Im a first day reservation holder, but went ahead and bought a base 75D, inventory, and slightly discounted. After the EV rebate, came to approx $80k, which is in and around what the M3 will come to market at with the options that I wanted (glass roof, AWD)....especially when you factor in the idea that the rebate may cease to exist once the M3 hits the market.
At the end of the day, the M3 is an expensive car once optioned out. I agree that when comparing the $35k model to a Leaf its compelling, but that's yet to be seen....thus far its all fully spec'd launch edition models. Also, based on my experience with my 75D, the $35k standard battery will be tight for Canadian winters.