The odds you'll buy a 7DII are increasing to 99.99% Jack.
They are. The more I think about it, the more I don't want to give up
this macro lens by leaving Canon. I would have to buy a whole host of gadgetry from Nikon to get a 1-5x lens range, with nowhere near the flexibility or convenience of this lens.
The MP-E 65 mm is yet another specialty lens with which Nikon can't compete.
Your posts are litteraly droopling with want, its leaking from the screen.
Literally
Drooling
It's
The wait is going to be long till availability. 
Cheers,
Bernard
Bernard, you're satisfied with your D810, right?
It takes beautiful images, don't you think?
Does it really bother you that, good as it is,
it will NEVER take single imagery as well as the best MF cameras.
Never.
Does it bother you to be "less than" in the sensor department?I guess not. I guess you are okay with taking "less than" images,
every time, because I guess you think your images are "good enough."
I guess you like the overall price point + versatility of your D810, so you are pleased with "good enough" in the sensor department to enjoy the overall versatility of your D810.
Well, guess what Bernard?
Other people make similar choices as you, but with different cameras

I think the images that come from the 7D II (as well as my own 7D) are "good enough" ... I think the overall versatility of the new 7D II will trump your D810 (as the versatility of your D810 overall trumps a Hassy).
And just as you know that, individually, the images from your D810 will come up a bit short compared to the Hassy, you are still comfortable with the trade-off, and people will still enjoy the images.
Now try to use your head to think real hard (outside your own little Nikon-centered viewpoint), and stop to consider the fact I shoot different subjects than you. Nikon simply does not have an answer for much of what I like to do. (Or a complicated, inconvenient answer with nowhere near the versatility.)
Therefore, like you, I don't care if some pixel-peeper wants to blow up my images and say they're not quite as good as a D810 (just as you don't care that this same thing can be said of your D810 and a MF image).
It's the versatility, Bernard, not just the single image.
It's the lens range, Bernard, that fits my photography, not just the sensor.
In the end, I will be tailoring my choices around
my interests and needs, not yours, and not because of quibbling over the sensor either ... just as, ultimately, you have "settled" with your D810 sensor as well, in comparison to other higher-end sensors. Your D810 system fits your choices better overall.
My equipment purchases will fit mine.
I hope that's okay with you

Jack