Talking about Mimikyu, Decidueye and etc, I'm kind of the opposite of what I saw recently in this thread: if a Gen VII Pokémon that isn't Mimikyu is made playable, I'll be quite disappointed. Nothing that would make me give up of buying the game obviously, but the disappointment would be there (I mean it's weird to say "disappointment" if they didn't promise us anything, but you get my point). I guess I'm not really fond of the other two choices seen as most likely (Lycanroc and especially Decidueye). Unless if they get some really awesome movesets, but idk. I'm kind of the same if anyone other than Elma is made playable in Smash from Xenoblade, but in a lesser scale. I'm really rarely disappointed by character choices like this, I think those two cases and if another Metroid character got in and Ridley didn't are the only ones that come to mind
On other topic, I really... Dislike the BOTW stage they chose. It's just... a tower. Felt really lazy to me. Regardless of it being iconic or not. I still think that Hyrule Field with some random stage hazards like a Guardian appearing in the background and shooting players would be much cooler and much more BOTWish than... a tower. It's the only major gripe I have with Ultimate so far, otherwise my few other remarks are so minor that I really don't mind them