There was a hint in his answer re the standalone M-model that wasn't included in the OP…
His full reply was:
Our brand core is still racing and high performance on the road. However, we also want to retain customers who are into expressive luxury. With the M8 and its derivatives, we have already partially succeeded. But there is a segment in which there is a lot going on and in which we are not yet represented. I can not say more about that.
So. Which market with a lot going on isn't BMW represented in yet… Should be enough clues there to figure it out guys 😉