It's funny reading on here, where people assume that polls represent anything. It's a super niche community of people who care so much that they post about it. Most of the "popular" picks like Geno, Waluigi, they're all mostly troll picks that were blasted out of proportion by memes. In the end, whatever is said here has little to no bearing over the much more complex truth behind all characters. Because Nintendo and Sakurai have a lot to consider: popularity with non-gamers, previous deals with publishers, history of gaming, polls here and there, new playstyles to introduce, and so on...
Look at fighter pass 1:
Joker: a beloved character from a great series of original RPGs. Great pick, made me discover new things, and opens the door for more Atlus stuff!
Hero: such an obvious choice! And to make it a generic one too. He's such a crucial part of gaming history! There's no leaker that can influence this pick even close to the reputation the character and series have by themselves!
Banjo&Kazooie: If you've ever had an N64, you know these guys! Their series didn't blow up like Mario did, but it's still one of the most popular games ever on the N64, and a massively requested character since the very first Smash game. And he plays so much like his original games!
Terry Bogard: People might not have seen it coming, but what a pick! Delves deep into the history of fighting games, and despite not being a fan of fighting games, even I knew who he was. A fantastic addition to the likes of Ryu and Ken, with a very unique look/design!
Byleth: Everybody saw it coming as soon as Three Houses hit the market, even if there wasn't a 300 pages forum thread about it. It's a great game, a promotional pick for a great selling game, and despite what the niche community here thinks, it's a very requested character from those who play the Switch more casually. Ignore the fact that it's another FE character and look at the very original moveset that came with it!
So yeah, personally, it's a 5/5 for me, and I'm very happy with Sakurai's and Nintendo's decisions. I'm certain they'll have great picks for Fighter Pass 2, even if they're not the most talked about on here. At least for me, as a mix of seriousish casual Smasher, and others like me. It's such a great version of the game, that I don't think there'll be a future one, but rather they'll port this one to whichever console comes next. That's probably much easier to do with all the publishers involved, than to make an entirely new game and renegotiate everything. As Sakurai himself said: there's almost no chance of this big a roster ever coming to life ever again!
That being said, as others have said, we're here to guesstimate and kill time between announcements, there's no reason to be pessimistic or trash other people's ideas, or bring nothing to the discussion. I'm surprised the mods haven't acted harsher on this one user, considering how many official warnings he's gotten in the little time I've been here. There's only so much a killjoy and troll can bring to the community if he can't learn with that much backlash against him.