Well, anything's possible at BMW these days.
They're the masters of niche marketing, discovering products we never knew existed, let alone wanted.
Look at this stoopid model - a hardtop, 4X4, MotorSport version that's (I guess) aimed at people with an identity crisis who don't actually know WHAT they want to drive, so they buy a bit of everything - a Frankenstein Mongrel...
So a 9 seater convertible version?
Entirely possible.