Now, here's a question, a lot of people either hate or dismiss the Sal leak because of the new comers.... but who are people really expecting that didn't make it?
The way I see it is: Ridley and K. Rool - Dixie if K. Rool is not in - Isaac - a Retro rep (such as Takamaru or the Duck Hunt Dog.) Is that it? That really doesn't seem like a massive amount of missing characters to me.
Based on previous rosters and series prominence, people were "expecting" a new Fire Emblem character, a new DK character, a new Zelda character, Ridley, Palutena, Little Mac, Mewtwo, a new Retro character, a Namco rep, and maybe the star of one new unrepresented rpg series (Shulk or Isaac). If the MK leak
AND Sal Ramano leaks are true, about half of that ends up being true depending on how you look at it, but the half that doesn't includes Ridley, K. Rool, a retro rep, and a Zelda rep, which were all some of the most popular requests:
35 slots in Brawl - 4 cuts (Definitely Ivysaur and Squirtle, maybe Snake and either Lucas or Ike) = 33 slots with Charizard taking over for Pokemon Trainer + 2 new slots for Sheik and ZSS = 35 slots just like Brawl + Rosalina = 36 characters + 11 Sal Ramano newcomers (Villager, WFT, Megaman, Little Mac, Pac-Man, Mii, Palutena, Chrom, Shulk, Greninja, "Chorus Men") = 47 characters + Mewtwo = 48 characters with 36 Veterans, 12 Newcomers, and 4 cuts. In this image, I cut Lucas over Ike based solely on the fact that he's much more cloney, but it could go either way. Losing Ike or Lucas would make me sad and losing Snake will make me REALLY sad.
Assuming Sal's roster isn't complete and the MK leak is wrong, we could manage 4 more characters for a total of 52. K.Rool/Dixie (DK Slot), Ridley (Metroid Slot), Takamaru/Duck Hunt Dog (Retro Slot), Isaac (Popular Unrepresented RPG Slot), Tingle (Zelda Slot), and the return of Snake and/or Lucas/Ike are all very solid contenders for the "expected" slots that Sal's leak doesn't cover. I know Ghirahim is considered the Zelda front runner round these parts but oh please. That's 9 major contenders for four hypothetical slots. The rpg slot and retro slot are arguably filled by Shulk and Little Mac respectively, so If we were to get Ridley, K. Rool, Tingle, and Snake after all, I would be ecstatic. This is all really reaching but that's my analysis of what we expected versus what it looks like we're getting.