Definitely believe LM4 is on the table for Nintendo considering how big 3 was on the Switch. 

I'm curious what kind of boon the Pikmin series will see now that it's getting so much love suddenly.

Hard to say this was an intentional tactic, but I was slightly disappointed when they announced the Pikmin 4 demo was a week away when I couldn't imagine why it wouldn't be ready to shadow drop, then while browsing through the series on eShop I noticed Pikmin 3 had a demo and gave that a go instead. From the get-go it's delightful atmosphere totally hooked me in and I immediately ordered the full game afterwards, even though retail copies here are $20 more expensive than Pikmin 4 coming only a month later.

More likely they were hoping fans already into the series would pick up Pikmin 1+2 while anticipating the Pikmin 4 demo. Even if they're just basic HD ports with some nice controller support thrown in, it's always great to see a full series release on one system, especially when it has such a strong cult following. Hopefully Luigi's Mansion will follow suit eventually (especially since this also has a gamecube version they can easily port in HD).