Bayonetta 2 seemingly did betwenn 0.8 and 0.9 million in the Wii U and since then, its notority increased with her appearance in smash and it will even more with the ports releasing on Switch
So I think its realistic to expect at least 2 million sales for Bayo 3 on Switch.As for 1 and 2, thats simply impossible to know.It will do at least 500k, but its really hard to say much more than this.Something inside me tells that it will pass the 1 million barrier though!
My (locked) thread about how difficulty should be a decision for the developers, not the gamers.
https://gamrconnect.vgchartz.com/thread.php?id=241866&page=1