Pretty much. The highest amount of build-up for a character by this point that has hardly gone unnoticed all the way since Brawl.
That alone makes Waluigi might be only "fan-favorite" character that'd be notable enough to make for a memorable addition via catharsis alone from 1st-party side.
It's such a stinking shame that after him, it kinda feels like we're probably not gonna get anymore Nintendo-characters requested for as long, or even longer, than him.
A lot of time I've been pondering will the general hype from SSB6's side on 3rd Parties be mainly from Indie games getting even more bigger attention and "victories" in means of being part of Smash, with possible inclusions like Sans or Reimu Hakurei.
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That does make me wonder about my following current belief: I'm genuinely feeling that 1st to 2nd Party additions long requested from older generations like Toad, Dixie Kong, Bandanna Dee and C/D-listers of Nintendo have become the new norm of low to none to be entertained on the roster next to 3rd Parties - basically an inversion of how things used to be way back in Brawl-era.
Some might interject this with us still having goof chances with both B-Dee or Dixie - I'm feeling that the more times change alongside the demographics' expectations or nature with every game they've not been allowed to board the train on (Ultimate, but SSB4 even moreso) - the more lacking in relevancy or worth of inclusion they seem to become next to more hype-inducing, history-writing 3rd-party based clashes with Nintendo's biggest icons.