I'm confused, did people genuinely think otherwise?
But it goes both ways.
I have seen people insist that Nintendo owns the IP when that has clearly never been the case.
The reason SOME people have brought up the idea of a port is largely down to how much ownership Nintendo had over Bayo 2. We have seen in the past, with Ninja Gaiden and Mass Effect for example, that MS having publishing rights never prevented both these games being ported to the PS3.
But yes, Bayo 3 being Switch exclusive with Nintendo publishing is obviously due to Nintendo funding the games development. And if Bayo 2 shows that they do indeed have full ownership over that title, the same can be said about Bayo 3.
Still Im surprised SEGA didnt feel the need to fund the game themselves, in the light of the Yakuza series and even Valkyria Chronicles. But I guess the money they get from licensing offsets whatever potential hurdles in development and marketing they may wish to avoid for the IP.
Anyhow, Bayo 3 is being made... if you dont like the platform choice then too bad.
The huge difference being that Microsoft didn't put any money into the funding of either of those games. Which is why the people who "cite" them as examples are using flawed logic. It was Bioware's decision to put the first Mass Effect exclusively on Xbox 360, because that was the platform they were most comfortable developing for at the time.
"As the development team was already experienced with the Xbox console, they decided to develop the game originally for its successor, the Xbox 360, due to its improved processing power and development tools."
Just like it was Tecmo's idea to release Ninja Gaiden (2004) exclusively for Xbox 360 originally, because they were most impressed by the 360's dev kits.
"the Team Ninja Leader was impressed with the software development kits for the Xbox and pushed for his team to develop for the Microsoft console"
No exclusivity, or even timed exclusivity was ever a factor in these games. A developer choosing a single platform by their own choice, without taking any money in exchange, is free to later release on another platform later. A developer who takes money as funding for a game, as is the case with Bayonetta 2 and 3 both being funded by Nintendo, is not remotely in the same position to be released on competing platforms.
I know you show later in your post that you do understand the funding situation with Nintendo and Bayonetta 2 & 3. I'm just pointing out that anyone who thinks the release routes taken by Mass Effect and Ninja Gaiden are proof that Bayonetta 2 & 3 could end up anywhere but Nintendo platforms don't understand how different those situations are.