This is a bit late, but im just going to talk a bit about leaks and all that since for some reason every single one gets brought up and people aren't quite sure how to react.
There are two basic questions to ask for every leak
"why is this real?" and "why is this fake?"
Why is this fake- basically, is there anything that stands out to prove something as false. These usually apply to picture leaks. Stuff ike re-used renders/assets or animations clipping through he ground. Just general unprofessional things. See something like that, and the leak gets thrown out the window. Yeah you may have a few problems like "wario is clipping into G&W's box," but you at least have a basic idea.
Why is this real- for when something doesn't have something that automatically makes it fake. Is there any evidence that this leak/rumor is real in any capacity? Is the origin of the rumor reliable like a known leaker/outlet that could have this information? Or is this just a random post on a random forum or nonsense? For instance, i've had info in the past and I may have some now, but does that make me trustworthy? Not really. If there is no evidence that a list is real than what is even the point of analyzing? At that point it's just a wishlist if it doesn't have any evidence. . .