I'm kinda interested in Hey! Pikmin, mainly because of I'm fond of the 2D-style gameplay with some sort of twist added for good measures.
However, the fact that it's being developed by Arzest doesn't seem to be exactly reassuring for me. They're not only the ones who made the rather lukewarm Yoshi's New Island a thing, but a number of staffs came out from the defunct Artoon company, the latter of which having a mostly poor track record of games they've developed.
Therefore, I'm not confident Hey! Pikmin would boast a consistently solid level design as many of the best Nintendo-developed titles.