Well, didn't think I'd come back for another share of unpopular opinions. Oh well...
1.- Hating guest characters so adamantly because "I want Nintendo stuff" is a really ludicrous idea. Like, come on! There's currently only 10 guest characters out of 75 (about 13% of the full roster) in the game so far, and somehow people think they ruin the Nintendo feel? Lord help those guys if all five DLC characters were not-Nintendo (which is still too little proportion-wise)...
And speaking of guests...
2.- Yeah, I actually don't know if I'm interested in any more Nintendo characters after November's Great Purge. Isaac, Ray, Rex, Spring Man, Skull Kid, Black Knight; all shared the same fate. I know I didn't care about most of those characters (and in the case for some of those, I outright wanted them not to be in the game), but in the end, those were the poster boys for what Nintendo could offer, and now, what's left? The predictable promotional characters for Pokémon and Fire Emblem, Sylux, and whatever characters that weren't found among the datamined spirit list (and even then, with the new Pikachu and Eevee spirits for LGPE buyers, we know there's more to them than what we know); pretty boring (and depressing in a way) if you ask me.
Now, despite this, if won't whine if any Nintendo character shows up in the Pass, not even if they're from Fire Emblem. I know that it's their game after all and I accept that.
3.- I don't know if I should even consider this as an unpopular opinion at all, but doesn't anyone else feel like hype for highly requested characters dies pretty quickly? I mean, people loved Mega Man, Little Mac and Pac-Man when they were all announced in the last game, but soon enough many would pretend they were just there without any sort of care for them. Same here, you'd think the Inklings, Ridley, Simon, Dark Samus, K. Rool and every single veteran back would make everyone excited, yet it feels like many just forgot about them and moved on to other interests.