Questionable. I think both models would be utterly low volume, but the RC-convertible would be more appealing.
Then again, the MDX sells about 53,000 units per year in the US (5,000 in Canada), and the Q7 about 15,000 (and 1,600). I suppose there is something of a market there, but I'd wager RX sales will drop by whatever # this proposed SUV will bring in.