I think they'll go the lazy way, to be honest. Out of the list, I think something like Twilight Princess or The Wind Waker HD would be strong candidates, as other than adapting the controllers they got it remade not long ago and a lot of people that were holding out for their Wii U are considering to get a switch now, so having the Zelda titles you can play on your Wii U (including Skyward Sword through its wii virtual console) on the switch would be tempting, especially if they add a little extra.
If the don't go extra lazy, I can definitely see them starting with a Skyward Sword HD project.
This might more me than a good strategy but I hope that once they actually feel confident to drop the 3DS, their OoT and MM versions will make it to the switch. I know some people really want to see changes more akin to what the Spyro collection is doing and remaster in exquisite HD detail like some unreal engine fan projects and I doubt people would oppose this if Nintendo decided to do it.