So much conflicting information being thrown out between existing info, the Grinch thing, and now SpawnWave and co. that I don't think anyone can claim "Occam's razor" as a defense for anything.
At the end of the day, I'm going to remain highly skeptical on the supposed roster leak in particular unless there's more substantial evidence found in its favor that corroborates known existing information. Most particularly, as I said the other day, there's a TON of information left to be seen about this game; I don't buy a single Direct detailing five unique newcomers, and then "Spirits and online/DLC/demo/what-have-you" because in reality, that remaining chunk of non-character content is likely way bigger than anyone seems to be giving credit to, even in an abysmal worst-case scenario where the single-player content's more lackluster than Wii U's. Even if there were another standard Direct pre-launch, it wouldn't take too much load off of how long would need to be spent on five unique newcomers.
The only thing that's baffling is the fact that whatever the veracity of this rumor ends up being, it seems inextricably tied to a real person. At this point for me, in the absence of truly compelling visual evidence either way, it's a matter of what makes more sense; 7 or more unrevealed characters that read like a wishlist and fly in the face of official statements (and frankly, common sense), or a fairly elaborate array of faked or partially faked artifacts tied to a confirmed employee of a company that could conceivably have inside info?