I don't it's fair to say with absolute fact that a leak is fully "debunked". Sure, some leaks have obvious "Are you even trying?" bull**** like that paper with "Fire Emblem Memories", "Punch-Out! Become the Champion", and "Yoshi's Flipping Island".
..."Yoshi's Flipping Island". And they misspelled Intelligent Systems as Intelligent System. Biggest screw-up right there.
But on the other hand, you have Vergeben's AND Lazzyman's leaks. Neither one has become 100% true or 100% false. There's nothing that's total bull**** from either leak, and both have SOME form of credit behind them. The ResetEra mods kinda teased/hinted with Ridley, and they hinted towards Mario Tennis Aces "this Direct is going to be Aces" before it was announced.
I'm not really entertaining the Imgur leak because... well, it seems like anybody could post random images on there and claim a "leak".
But one thing doesn't really change. While it's fully possible that Ridley might not be in, he stands more of a chance than he ever did before. So we really have some reason to hope, and Sakurai has changed his mind before, as seen with Villager, Pac-Man, and the Miis who he couldn't really envision in Brawl.