I’ve discussed before how it’s entirely possible that Nintendo did some research among the fan base to see what was highly discussed with Smash while the first Fighter Pass was being developed. In other words, what was talked about, what seemed plausible.
It’s possible that they could use that information to inform their current choices, or the ones following the Fighter Pass.
Crash fits that. Reimu fits that (still amazing that she started as a meme on /v/ and grew into something bigger). Resident Evil fits that. Devil May Cry fits that. DOOM could fit that.
What I find interesting is that all these different “leakers” are coming out with very different things, all around the same time...it’s just weird.