Not a chance.

A lot of people said the same about Xenoblade Chronicles 2 releasing in 2017. 

Time between Xenoblade X initial reveal ---> Release: 2 years, 3 months and 21 days.

If we apply this to Xenoblade 2's reveal, it would comparably come out May 2nd, 2019.

Very few people believed Monolith Soft would actually pull off a 2017 release date.
They did a gameplay trailer and reveal for Xenoblade Chronicles X as well when they showed that game off for the first time in their January 2013 Direct, that game ended up coming out in April 2015 in Japan, December 2015 in everywhere else.

So everyone was right to doubt that they could suddenly pull off a simultaneous worldwide release for Xenoblade Chronicles 2 within the same year it was announced. 

But, they proved a lot of people wrong, myself included. And it turned out to be a really great game. A better game that 'X', in my opinion. 

And Nintendo, as a whole, had been astronomically better with announcements and release dates for the Switch's first year than they ever were throughout the 3DS and Wii U's life cycles. So, it's not too far fetched now to think that Bayonetta 3 in 2018 can happen. 

It's possible. Because Bayonetta 3 isn't on a significantly different generational hardware from Wii U, they can re-use the engine and a lot of assets. That would speed up development.

They're probably working on it for more than a year, so I could certainly see that.

YES

Maybe if it's not developed by Platinum. I heard they have enough other projects.

I'm glad people are interested in Bayonetta 3.

Well nobody didn't said its not 2018. game, so 2018. release is definitely possible.