Maybe, but they're not there for no reason, this isn't like the supposed Metroid Prime Trilogy leak that happened a while back.
So what if the SKUs have been there for months and supposedly won't be used? Tempering expectations is one thing, but the deadline for the fighter pass deal is the end of next month, so they can't afford to lag much longer.
Also, we'll hear something from PlatinumGames, at the very least:
http://www.nintendolife.com/news/2020/01/expect_big_news_from_a_full_speed_platinumgames_this_year
Now this here might be actual evidence.