Speed reports BMW is in talks to race a Z4 GT2 based on the Z4 GT3. BMW Motorsport director Jens Marquardt stated the M3 is pretty much maxed as it is:
This year it has been very much down to the team and the drivers extracting 100 percent, and sometimes [more than] 100 percent, out of what was there, Whatever resources we'd put into the M3, there is not that much left in that car. I think this is really what we have to be honest with ourselves about. Looking at the potential the Z4 has, I think it's a logical evolution that could be the solution for us. We just have to make it work.