My biggest concern with a CSL or GTS or CRT is the price tag.
The low volume makes the price go up to the moon. I drove the GTS. It s very nice but at such price i rather buy a normal M3 and mod it myself.
Same goes for an M2 CSL if the price is to high.
I rather see a new M2 mass production car. The buldog looks from the 1M more colours to choose from. 6 cil turbo engine. More focus on less weight (Carbon roof) More alu and carbon used. 340hp and 500nm is enough.
I rather see some sort of clubsport option off factory. Like the porsche GT3 has.