I don’t think that’s true. In fact, out of the 8 newcomers we’ve seen so far, only 3 are villains. The theme so far actually seems to be popular, highly requested characters. Just so happens that 3 are villains.
Skull Kid is strange because we still haven’t seen his assist trophy, which always makes me think the character was promoted. However, as we can see with Ashley, this doesn’t always play out the way we think.As for my opinion on Skull Kid, I think he missed his chance. Peak popularity was Brawl with a brief resurgence after the Majora’s Mask remaster. I don’t think we’ll see him playable.
Could be wrong though. And if I am that’s fine, with K. Rool and Ridley, I feel the roster is finally “complete.” Anything else is just a bonus.