All of the text is replaced by the body of Resident Evil game guides from GameFAQs and Neoseeker, except the terminology is replaced by Borderlands-specific terminology. Also everyone has been redubbed by Battleborn characters.
Borderlands 2 (or the Handsome Collection, but that seems unlikely) for Switch makes perfect sense; I'll definitely be picking it up if it's an actually decent port (though if it's full-priced that seems less likely).
This is actually a good shout too, considering a few influencers got to demo it a few weeks back and that Sony had a 5 month exclusive deal, meaning it could come out on May 15, 2019 at the earliest. Honestly, I'm thinking it's both Borderlands 2 Switch and VR of Rift and Oculus. 2K really want to go all in on the Borderlands brand now that 3 is on the horizon, try and get the games on every platform.
Don’t give too much importance on those statements, there was a game similar to Pillar of Eternity where the devs said it would never be on Switch because it has too much text (sorry I can’t remember the name), and then several months later they confirmed it was being ported to it.