Earlier in the week, the Taiwanese game ratings board added in Switch listings for Bioshock Remastered, Bioshock 2 Remastered, Bioshock Infinite: The Complete Edition, and Bioshock: The Collection. If that wasn't enough proof that Bioshock is coming to Switch, we now have another ratings board backing it up.
The Brazilian ratings board has just added listings as well, showing Bioshock, Bioshock 2, Bioshock Infinite, and Bioshock: The Collection for Switch. The dates on the listings don't make any sense, but each listing specifically mentions Switch when you click through to read the details.
I'd say the Bioshock collection of games for Switch is pretty much a done deal at this point. All we need is a Nintendo Direct to announce them!