I guess you could say Farfetch'd new form got leeked. Any bird Pokémon is a top notch addition to the Dex in my opinion so to have a new line of Farfetch'd (assuming this is an Obstagoon situation, which it seems to be based on the white coloring of the feathers instead of brown) is a win in my book.
Rounding out the topics discussed is....Edelgard? Scrolling up, it seems the quotes are to blame, considering what Sakurai said on the post-pass dlc having people saying there should or will not be more first party options. I'd say first parties still have a shot. Corrin got added despite the m/o of the Smash 4 DLC being veterans and third parties. I actually doubt that Sakurai's roster philosophy has shifted more towards third parties since Ryu. He seemed to be pretty psyched to be working with Street Fighter content and back then, I think I recall him saying something simiar as what he said now regarding collaborations. While i can see the Fighter Pass being all third party. (Which makes sense considering the stages, music and Spirits are more exciting if they're from a whole new world) but l could see some of the post-Pass "content packs" being a first party character + some relevant music. Again, like Corrin.
Spirits are in my opinion obviously, fair game again. Pass 1 might've been planned during base game, but post-pass Spirits are like trophies and can be essily removed or modified to account for it becoming a fighter.
All this brings us to Edelgard, Byleth and the Legendary Wolves. The *other* reason Corrin got added. While saying he was a "promotional pick" is cutting corners (I'd say it's an overgeneralisation rather than stone-cold misinfo though), Corrin was added to make sure he wouldn't fall in the shadow realm between games. Two of Smash's revolving cast series are Pokémon and Fire Emblem. (Zelda has a revolving cast too but its plethora of sidekkcks and story-specific characters never got to see the light of day as fighter, instead being all holed up in their AT). Edelgard, Byleth, Zacian and Zamazenta are the new faces of these casts. (Of course, there's plenty of Pokés that could potentially break out and become popular but for the sake of this thread, let's keep it biased.)
Edelgard is like Decidueye, becoming popular before most of its game's content (including the teaching mechanic that would make Byleth the main character) was revealed and being a placeholder in fan rosters for "pick one from new game". This isn't a bad thing, especially since Edelgard did turn out to be the most important of the House leaders. The "axe" argument has been replaced by her legitimate interesting character development throughout the game, something that Byleth simply lacks in comparison due to being the avatar character). Of course, I haven't seen the full scope of Edelgard support and it's possible it's still based on her weapon not being a sword. In the end, I'd say Edelgard v Byleth comes down to preference. Byleth is the main character and unlike Chrom, can easily have a great moveset on its own. Edelgard's prominence is nothing to scoff at either though and her character might give her the edge for some people. I think a possible Three Houses character is gonna be Byleth, but I personally prefer Edelgard although I also commend that Byleth's set potential might be bigger than Edelgard's.
For Zacian and Zamazenta, we seem to be in the fog of war except there's no war. There's simply too little we know and even less that has officially been revealed to the public. It makes speculation hard, especially since Sakurai would get his heads-up an undetermined amount of time sooner than the public can settle on a favorite. Or not. Smash DLC post-pass is also uncertain. Sakurai might be able to only start picking the eventual Pokémon fighter once the game has been released and the audience has picked a fave if DLC goes on for that long. We don't know if Game Freak/TPC/The Other Powers That Be pre-ordered a spot in the DLC line-up or that Sakurai skips Pokémon. A lot of unknowns yet, which is why I've spent most of the time talking Three Houses.