Basically every character I wanted in Smash Bros. already got in Brawl, so at this point I am more concerned with who stays more than who gets in. I mean half of the characters I want for Smash 4 are characters whom have already been playable (Mewtwo and Roy), and only one is a proper Nintendo newcomer (Ridley). I also would be hyped if Mega Man got in.
I still think it would be neat if K. Rool, Little Mac, Palutena, Dixie Kong, Waddle Dee, or Toad/Paper Mario/Bowser Jr. show up, though I certainly don't care about them as much as the previously mentioned four, and I would not be irked at all if they failed to make it in.
In my case, I am more concerned about being able to play as certain characters in at least one Smash game. That's all I am asking for... if they come back, yay! If they don't, oh well - at least I get to play as new characters.
For example, if Meowth is playable in SSB4, I would be very happy that I finally got to play as Meowth... and then when SSB5 comes around and Meowth is cut for another Pokemon, I would be disappointed but then I look at the bright side and say "at least I got to play as Meowth in SSB4" and I go back to play SSB4 for Meowth and other characters who are not in SSB5. I also get to play as new characters in SSB5 and become fans of some of the new characters because I liked their playstyles.
When I was trying to decide which Fatal Fury game to download from Wii Shop... I did a comparison of the rosters from Fatal Fury 3, Real Bout Fatal Fury, Real Bout Fatal Fury Special, AND Real Bout Fatal Fury 2.
I noticed that Real Bout Fatal Fury had the same roster from Fatal Fury 3 plus some new characters.
I noticed that Real Bout Fatal Fury Special had the same roster from Real Bout Fatal Fury plus some new characters.
I noticed that Real Bout Fatal Fury 2 had the same roster from Real Bout Fatal Fury Special plus some new characters.
Which game did I download? Real Bout Fatal Fury 2. There was no point in getting the other Fatal Fury games because all the characters from those games are in Real Bout Fatal Fury 2 but with some extra characters that are only in this game.
The other Fatal Fury game I downloaded was Fatal Fury Special because it had
Raiden most of the same characters from Fatal Fury plus some new characters and because both players can play as everyone on the roster as opposed to Player One being limited to 3 characters while Player Two can play as the bosses in addition to the 3 characters.
Also, I did not download the first two Art of Fighting games from Wii Shop because most of the characters in both games are already in The King of Fighters '98 or in either Fatal Fury Special or Real Bout Fatal Fury 2... so I opted for Art of Fighting 3 since its roster is completely revamped so I get to try out new playstyles that are not in the other fighting games.
If SSB4 had the same roster from Brawl plus some new characters, I don't see the point of a new customer buying Brawl when he can just get SSB4 instead. If SSB5 had the same roster from SSB4 plus some new characters, I don't see the point of buying SSB4 when I can just get SSB5.... and so on.
This is why I am open minded regarding character cuts. Pruning away old characters in favor of new characters keep the Smash sequels fresh and not stagnate into Brawl 2.0 (SSB4), SSB4 2.0 (SSB5), SSB5 2.0 (SSB6), and so on.