But... it's a Square Enix game. They already are third party!

IF true can we also get the originial FF7 (Android port?) too. 

The mobile gaming industry in Japan is very strong. And 3DS is still relevant for at least a short while longer. They can also release games on Switch if they want. But if we're talking about portable games that would normally come to 3DS, then we're talking about smaller budget games, and not a game of Final Fantasy VII's caliber. Publishers mainly went to the home consoles for the big budget titles, and the 3DS for the lower budget titles. PS3 got Final Fantasy XIII, while 3DS got Bravely Default. WiiU got Breath of the Wild, and 3DS got A Link Between Worlds. Etc. Quality games for sure, but there's no doubt that the lower budget for them was appealing to publishers. And this particular game is a remake of what's probably the most important game of their careers, that they want to make as good as possible. I don't see them gimping the lowest common denominator to program for down to undocked Switch. Especially not based on first month sales.
I mentioned the push to replace 3DS in reference to sales, but whether Nintendo do that or not won't neccesarily impact the chances of big budget games outside of Nintendo's own to focus on Switch.

As for those who did not predict that Switch would sell out, there were also many threads making the point that 3DS would be replaced before WiiU. In spite of overwhelming evidence pointing to the opposite. (3DS was selling more, and had more upcoming games announced for it, etc.)
We should not base our outlook on the predictions of random people. Them being wrong is not an indication of things going better than expected.

Believe. Three e's.

You spelled be live...

I'd say it's more like 85-15 when it came to popular Switch rumors. Pretty much every popular leak, aside from the fake controller, turned out to be true.
And this was from Eurogamer. They were spot on about the Switch concept, and the specs of PS4 Pro. Their modern track record is way beyond 50-50.

If their initial report was inacurate, why haven't they redacted it yet? They have a huge reputation to uphold in the industry now. To the point where they were the only ones chosen by Microsoft to get the exclusive first look at Scorpio.
They're not going to get exclusive scoops like that if they publish inacurate specs without redacting their story after the system is out and they can properly check if their info is correct or not.

Snake Pass is an Unreal Engine 4 game. So is Bloodstained.

Do I need to say more?
You can make undemanding UE4 games that scale well, if they're designed that way.
You can also make extremely demanding UE4 games that do not scale well on weaker hardware, also because they were designed that way.

If you get one chance in your life to do a remake for the most important game of your career, and you want to have as few limitations as possible to make it as good as you can possibly make it, then holding it's performance back to a standard significantly below the current generation is not an obvious or easy choice to make. No matter how popular the system turns out to be. (See Wii and how every popular Japanese console franchise majorly ignored it.) And especially after less than two months worth of sales.

So, same like DQ11, KH3, FFVIIR...

Evre game could be scaled down, and UE4 actually offeres by default very easy scalability.

They can make game that take most of PS4 hardware and still scale down that for Switch. You do realise that Wii had CoD ports from PS3/Xbox360 CoD games, Wii that was around 20-30x less powerful than PS3/Xbox360. Switch is around 3-4x less powerful than PS4, and actually its very easy to work with Switch and completely support UE4 that is well known for its scalability.