Some of these suggested ports don't make much sense or have been ruled out. With Mario Maker and Pikmin 3 it makes more sense for Nintendo to make new entries, given 3DS got its own version of Mario Maker, so I would expect Switch to get one too. Pikmin 4 has been talked about in the past as nearly finished - so it may be ready to launch any time soon. Nintendo have already ported one Wii U Mario game this year, so I think that rules out 3D World. Xenoblade Chronicles X has more or less been ruled out by Monolith Soft themselves given the scale and expense of porting it.
I could see the HD Zelda remasters coming at some point - but several journalists and 'insiders' are expecting a 2D Zelda this year, so that potentially rules them out for 2019.
I think the next Wii U port will be Wonderful 101. It was hinted at by Platinum last year and they've said they will have a busy 2019. We shouldn't rule out seeing more than one Wii U port later this year - but I don't think the list above are especially strong candidates.