C'mon, this isn't like that Wii U E3 sizzle real.
Skyrim is prominently featured in the friggin' switch reveal video and Bethesda is listed as one of the developers onboard. There's absolutely no way that isn't a real game. I have no idea why Nintendo wouldn't let them officially announce the game, but as was pointed out they haven't even officially announced anything besides Zelda, which was already announced. We also haven't seen any other companies come out and announce Switch titles. They appear to be holding back until the full launch showcase, for whatever reason. Hopefully it's soon.
Well...
I just rewatched the Wii U sizzle reel from E3 2012. Dirt, Alien: Colonial Marines, Tom Clancy's Ghost Recon Online, and Metro: Last Light never made it to Wii U. All four were shown right in a row after Darksiders 2. In the case of Metro: Last Light, its developer, 4A Games, even openly mocked Wii U before the port was cancelled.
Right now, to be fair, this is almost exactly like the Wii U E3 2012 sizzle reel. I can't see NBA 2K17 releasing on Switch. The season is almost over at that point. It's encouraging that Bethesda is even on record to support Switch, but after it backtracked on confirming Skyrim, I'm not ready to believe the game is really coming to Switch until pretty much when I see it in stores. The reaction to portable Skyrim has made the most noise out of any of these games from the reveal trailer so that's something.