You can't use that in your argument, because it doesn't acknowledge these re-releases whatsoever, and there's no question that their numbers are quite valid to some degree.

It clearly shows Nintendo do not count sales of Classic consoles towards the sales of the original consoles. The Snes has still sold 49.1m, and the Nes 61.91m

No, it clearly shows that Nintendo have not publicly considered counting them. Until there is something, from Nintendo, that acknowledges both SNES sales and SNES Classic sales in the same document, you cannot use their statements to either support or deny inclusion.

True as long as the system was well received.

But just look at how the Wii U did the moment Switch was officially announced: The Vita sold on the week before Christmas about as many consoles as the Wii U did the entire month, almost a 90% drop YoY! And while I don't expect such a harsh drop with the XBO, I still think that many will prefer to wait for the new system rather than buy a XBO after the announcement of it's successor, as it's gonna be much more appealing.

With a price drop and the next generation one year away, I think it can sell 10 million more, if not at least it will get very close.

Yep I'd say a significant price drop for the Xbone One S and SAD would certainly hit the mark at this point. The SAD should be no more than $150 USD IMO. 

Sorry for the necro post but I was looking up the thread.
I was of the opinion earlier in the year that the Xbox One beating the SNES was not a fait accompli but I have to say I was wrong.
The Xbox One has sold 6.2 million units in 2019 so far (according to VG Chartz) and is now only 4.5 million units behind the SNES. With a strong holiday 2019 and then solid 2020 it should easily pass the SNES.

This is me eating crow...

It has sold 2.6m this year, not 6.2m

Well that's embarrassing...

Sorry it's late here (in Australia) and I worked 14 hours....

Well now that I'm here does this mean I might have been right?

I'd still say no - the Xbox One X will have plenty of legs - especially if Scarlett is backwards compatible... 

Even if we assume it only does like ~3m in the holidays of 2019.
It should be able to do the last 3mil or so, to hit SNES numbers by end of 2020 imo.

Xbox One should outsell the SNES going by current sales data.

"the Xbox One X will have plenty of legs" (to outsell the snes? yes, but in general? no, I doubt it will have great legs)
once the Next Xbow is out (Xbox Two?), I suspect the Xbox One sales slow to a crawl.

While I could see the PS4 sales continue to sell okayish the first few years into the PS5's life cycle.