I've had another thought pop into my mind while thinking about Pass 2, so screw it, time for more speculation, this time about Byleth and Nintendo stuff of all things.
I was considering whether or not we would get more first-party stuff, and whether they would be promotional picks like Byleth, which led me back to how weird of a promotional pick Byleth actually is, coming out 6 months after their game released and being the last character in the pass, which led me to think about the pass's conception in the first place.
So the pass was finalized in November according to Sakurai. The question this raises is "Who was the last character to actually be finalized?"
Joker? I mean, he was the first character revealed and Sega was already working on the game, so it wasn't him.
Hero? Same situation as Joker, and its been speculated alot he was meant to be base game/the first DLC, so it probably wasn't him.
Banjo? Everything seems to be pointing to him being negotiated in mid-2018, somewhere around E3, and Sakurai discussed how well negotiations went, so I doubt its him.
Terry? Maybe, but SNK's seeming willingness to let the Smash team do whatever they want implies they were pretty lax on the negotiations, so I doubt is was them.
That just leaves Byleth as the last character, which makes sense given our time table. Characters take about a year from raw conception to completion, and given that Byleth was basically completed in November it works out.
So what is the point of knowing this? Personally, I don't think Byleth was locked in stone until around the time Sakurai tweeted, and instead, I believe Nintendo always wanted some newer first party character in the pass, but it was actually between several choices, and one of those in my eyes was actually Sylux. Lets think about this for a minute. Hes one of the most peculiar characters missing as spirits, even though 2 of the other hunters are present and hes by far the most well known, and he is confirmed to play a major role in Prime 4, both by the developers themselves and being teased at the end of both Prime 3 and Federation Force. Around this time though, its clear Prime 4 isnt going well and is likely getting moved to Retro, pushing back the release by years. Sylux is off the table and Sakurai chooses between Byleth and likely a new Pokemon, and picks Byleth because he already added a Pokemon this game.
Does this mean I think Sylux is coming eventually? Honestly, maybe, and if we do indeed get another "shill pick" from Nintendo, its him.