Some people just expect the best for some reason, even after Sakurai and insiders like Imran told them not to.
I mean, it's not like people are expecting 50 more characters or something.
So many posts in the past few months have opened with "given the low amount of newcomers", with many people thinking we wouldn't even get
any additional characters beyond what we've seen at E3.
And since then we've had an additional 3 unique newcomers and 3 Echoes. That's already the amount of characters a lot of people considered to be
crazy, cause after all, Sakurai said not to expect too many newcomers. But there's still clearly at least one more batch of newcomers going to be revealed prior to Smash's launch, and that's not accounting for additional possible reveals for other Directs, for instance at a Pokemon Direct.
Sakurai never said "hey guys we'll only X newcomers, k cya", he never quantified what "too many newcomers" is.
I honestly don't think that the expectation of 3 or so more unique characters beyond what we've gotten so far is being absolutely insane.