Why can't the poll have an option where I don't trust any leaker...? Oh well!
Anyway, I am the one true leaker.
There will be a Direct in Mid/Late November. It'll start with a trailer showing off fighters and the big story mode.
Trailer: Meta Knight will fight Kirby and have his mask kicked off. Going to pick it up, SKULL KID reaches it first. Laughing, Skull Kid plays with the mask, Meta Knight picks up his sword but is hurt by Skull Kid's dark magic. So one of his friends rushes to his defense! BANDANA DEE jabs at Skull Kid with his spear! Bowser then holds back Bandana Dee and other villains like King K Rool and Ridley begin terrorizing heroes will Skull Kid, angered, raises into the sky and screams for the moon to start its fall. But then, opposite to him, a silhouette in front of a Golden Sun appears. ISAAC. He fights and stuff, you get it. The match starts to look even, but it's not enough, the moon is falling, heroes won't make it in time, but many start to wish upon the stars... One gently glides down and possesses a puppet. GENO arrives! He dabs and jumps, ready to help!
The trailer is done. Sakurai looks amazing, sitting in an office that appears to be like uhh...I don't know how to describe...uhh...he's like, literally in Banjo & Kazooie's house, okay? Then the direct will go in details for these characters, their gimmicks, cute details, a Golden Sun stage, music, all that! Then it explains the story mode further, how you can co-op, how the cutscenes look cool, how enemies are from Smash Run and new ones too, areas and enemies here are actually from games instead of being original! Including Dracula, Rathalos, and woah, it's Dr. Eggman! Poor Sonic has to fight alone? No! SHADOW, as an echo fighter debuts! And uh-oh, looks like King K Rool has kidnapped Donkey Kong again! Diddy also has to fight alone? Nope! DIXIE KONG is his echo and is a big help too! Though they're both echos, Shadow has a Mewtwo-ish teleport for his up-b and Dixie has Donkey Kong's up-b. The hitbox is copied and pasted but she spins her hair instead of her arms!
Then hopefully, uh, I mean definitely, I'm an expert leaker, it goes into Melee-style specific Target Tests with an awesome new remix and the original theme, Race to the Finish is also back, and looks like Metal Mario as a miniboss is back and he commands the fighting polygon team from 64!
Then it'll go into Online which'll be a whole thing, but the big one is that there'll be actual rankings and profiles! All the personal records will be available to view and share, and your profile shows your favorite characters and stages!
Then the presentation will start wrapping up by saying the launch date is soon and that they had some more ideas that didn't make the cut. But, thanks to DLC, echo fighters will be released in waves similar to how Mii costumes were! They won't show any explicitly, but since I'm an expert leaker I can say that these will include Ninten, Impa, Funky Kong, Blood Falcon, Black Shadow, Ken, Akuma, Louie, aaand mooore! Alt costumes for Miis and other characters will also be teased, like Link's Gerudo disguise and Peach's wedding dress from Odyssey for Mario! Detective Pikachu and Yarn Kirby also shown, those four important Smashers will be shown together as the first wave of special costumes! But only as concept art, if it was finished it would be included in the base game, but they simply isnt ready yet.
Then Sakurai'll say bye basically and then BANJO KAZOOIE trailer.
Then Sakurai will return and say "Goteem! Oppa Damn Daniel style" and do the fortnite dance.
So, long story short:
Geno, Skull Kid, Isaac, Bandana Dee, Banjo Kazooie, Shadow E, and Dixie Kong E
Online and Story+Other Singleplayer
Teases for DLC Costumes and Echos