We talk about cuts a lot of the time here, so I thought I'd finally throw my hat in the ring.
I think people think about cuts wrong. The developers usually don't think about cuts in binary terms. They usually try to get as many characters back as they can. It's much more common for characters to get out-prioritized and left on the cutting room floor due to time and resources. Some characters that got included were originally a lower priority like Brawl Lucario or Smash 4 Bowser Jr. We also know that Brawl had some characters like Roy, Dr. Mario and Mewtwo planned, but removed due to lack of time.
As such, I based my list over what I believe each character's internal priority is. I did separate first and third party characters. I believe they are considered by different metrics, and they're a lot harder to predict. Third parties are thus, not ordered by likeliness.
This isn't the first draft of this list either. I actually asked for some critique, so while the majority of the opinions are mine, I was persuaded to make some minor changes here and there. I will say, I value Smash mainstays a lot. I also believe that very few Smash 4 and Ultimate newcomers are 100% safe, even if I'd bet money on characters like Greninja, Little Mac, Ridley or K. Rool staying from here on out.
Let me know if you have any questions.
Some of the text got messed up, but I can't really fix it.
EDIT: Okay, I guess I'll have to link it instead of uploading it directly. Fine I guess.
Some notes on some places where I'd differ:
- Ness, CFalcon to "very unlikely." To be clear, I don't want them cut nor do I think they will be cut. Cutting them probably also means their series is getting zero reps, which would be awful. But if I'm being honest with myself they're not 100% safe.
- Could argue Ike to "possible but unlikely," but maybe not worth actually having the argument.
- Sheik, Falco, G&W, R.O.B. all should be lower IMO. Could argue about how much lower if ya want.
After Wolf's ballot performance and Falco's decline in popularity, I think Wolf-but-no-Falco is possible. Plus no clones are that tier of safe, with the exception I guess that Ganondorf would obviously still be in the game in some form even if not revamped (and one other exception I mention below).
G&W, R.O.B. will probably be lower priority because of the "have no obvious future" thing and the fact that they aren't as popular or longstanding as Ness/CF, but I expect them to still make it. But the likes of Zard and Lucario are a rank above them.
Talking about Sheik is a can of worms, I know.
- Puff is on thin ice, and pretty much has been since 64.
Another ice analogy for ICs I don't think ICs would be prioritized much...this is where it becomes even more obvious that I don't value "longstanding" as much as you seem to. Could easily see an 80s retro newcomer prioritized over ICs, even.
- I'd actually move Isabelle up, despite being a clone. I mean, come on, she's been a breakout star and two reps for AC is too little if anything.
And Ridley, yeah, he needs to be moved up IMO. Only thing that ever held him back was feasibility, and, guess what, he's now proven feasible. Would've easily been justified in Melee or Brawl at the latest if he weren't believed to be too big.
And actually some others in this tier have at least an argument to be moved up: Greninja and K. Rool with their massive popularity, for ex. I'll add that it's pretty much guaranteed that at least one of the FE:Awakening characters will be in there.
- He's more safe than he's ever been at this point, but I don't think Sak values Mewtwo as much as the fanbase does, for whatever that's worth. Him being cut before makes me hesitant to put him too high, but I think he would make it, yeah.
- I don't think the possibility of ZSS being cut is talked enough. A character probably only added to (1) align with the transformation gimmick and (2) add a Metroid rep when the big guns like Ridley and MB were deemed impossible. Now she's divorced from the gimmick and we could easily have a solid Metroid roster without her, with Ridley, Dark Samus (further differentiated or not), and/or a potential newcomer like Raven Beak.
- Agree with the "fairly likely" tier for the most part, but Jr should be above them. Then again, I also have him below "possible but unlikely" tier so he's in an odd spot. I'd probably move Squirtle/Ivysaur down, also, if it was my list.
- I wouldn't put the Links in their own tier; TL to fairly likely and YL to most likely IMO.
- I don't think reception is getting Byleth cut. Especially if the FE roster is reorganized a bit to make it less enraging to those who don't care about FE.
- Third parties, yeah, who knows. Not compelled to comment too much on that rn.