But the only reason why you'd come up with a plausible explanation for a cancellation is because you want to cover your back.

but they showed the game before Wii u was even released

Its been advertised for the Wii U until 2 weeks ago. We have only seen what was believed to be the switch version on jimmy falon.

If this is true, my rumor is that a possible purchase of the switch is also canceled. Unforgivable if true. Lieing to us for years until 3 months to release window. I'm afraid that doesn't have a positive effect with me.

That was a tech demo with a totally different art style from BotW.  Nintendo did the same thing before the GameCube launched back in 2000, and what we eventually got was completely different in Wind Waker.  Nintendo showed some off-screen footage and a brief teaser trailer a couple years back that had people speculating whether or not Link was a girl in the new game, but BotW wasn't officially announced until this past E3, and was demo'd on the Wii U as opposed to the new hardware which everyone already knew was in the works and was all but officially announced at that point.

With new hardware just around the corner and the game still not ready for launch before the end of 2016, announcing it for the Wii U first became a moot point.

fair enough, but i dont see how that would have went over well either. Here is this cool tech demo for a new Zelda game on our new Ninty console...whoops there will be no new Zelda game on said console.

Still not reported anywhere else. That should be proof enough this is bogus.

http://segmentnext.com/2016/12/15/legend-of-zelda-breath-of-the-wild-5/

http://gametransfers.com/rumor-the-legend-of-zelda-breath-of-the-wild-canceled-on-wii-u/

https://www.gamingconviction.com/rumor-the-legend-of-zelda-breath-of-the-wild-cancelled-on-wii-u/

Websites I never heard of all quoting from the same source. So again bogus but I know you want it cancelled because you're one of those.

Explain then, why has the game disappeared from preorder at distributors like Amazon Japan, Biccamera, and Yodobashi, as linked in the OP?

Like Amazon is reliable. NES classic didn't even show up until day of release. Guess it was cancelled. Amazon also listed Dragon Quest VII then removed it then only listed the digital version until about a month before release. Target listed it as a June release during E3. When I worked at Gamestop Bioshock 1 was listed as canceled only a few months before release. Retail is funny like that. It's never an indication of shit.