Honestly I don't see why people who want this wouldn't have either preordered, bought near launch new, or bought during a b2g1.
I'm all for waiting for drops and sales but when it comes to first party Nintendo games, I usually just say

it. Those never drop unless Nintendo decides to "players choice", "million seller", or "Nintendo selects" them. And that only happens to seemingly randomly chosen titles and usually 4-5 years after they are originally released.
Look at Super Mario 64 DS. That game was an original DS launch title at $34.99. Today, two years into the DS's successor having been released, that game is still $34.99. Wii Music is still $49.99. Wii Music.
Sure, every once in a while a Fortune Street comes along and it ends up getting discounted at a location or two, but that is extremely rare.
I don't know. I just put my CAG nature aside when it comes to first party Nintendo stuff that I really want to play. Stuff I'm on the fence about, if I find it complete used or GameFly puts it on sale, awesome. But stuff I know I want to have, screw it there is no use holding off. It's not getting any cheaper. And sometimes it pulls a Xenoblade or Metroid Trilogy.