First of all sorry for my english, it is not even my 2nd language. This will be my first and last comment in Smashboards, I am not used to talk in forums but after seeing how things have changed in two days I will try to explain what I expect for the newcomers. (Also about the vets, because I think Snake will return back. I do not know why all the people say he is not going to make it. Metal Gear appeared in 1987 for Nintendo, thats a good point for him).
I expect 10 newcomers more and 59 characters in total, 27 franchises represented.
Newcomers:
1. Shulk. The retweets of the programmers and also because I still believe in some part Gematsu Leak.
2. Rhythm Heaven rep. Same reason as Shulk.
3. Isaac. He did not appear yet as an AT. For me Isaac is the most important character of the GBA era, as Golden Sun was the best game for GBA (not saying anything about Pokemon) and probably most people agrees.
4. Ridley. Sakurai is trolling us, if he was a boss I think Sakurai had showed him completly. I think he is making fun of us.
5. K. Rool. Kremlins? Not yet a stage? Only 2 reps for DK? Why is Sakurai not showing anything?
6. Ghirahim. Probably the coolest character that could be added. He brings personality and madness. There are big reasons for his inclusion: Skyword on LoZ characters alts, Skyword Stage, Skyword objects. Only one thing missing, him.
7. Retro. For me there are 3 possibilities: Takumaru, Simon Belmont, Mach Rider. I would prefer Simon but I think Takumaru has more chances.
Clones:
1. Sceptile. Greninja Semiclone. We had the 3 Pokemon starter types, why is not going to happen the same again? Nowadays (I hope you understand what I mean) SSB4 have water type attacks (Mario, Greninja), electric (Pikachu, Robin), Fire (Samus, Charizard), and plant (Megaman and Villager). Where is the Pokemon with Plant attacks?
2. Black Shadow. I am sure Ganondorf will get a new moveset, he has more potential. So I think his moves will go to Black Shadow,
3. Dixie. Diddy/DK semiclone. I think she will have DK B aerial (did I say it right?) but with her hair, and the rest of her moveset similar to Diddy.
Bayonetta could be another good choice, but probably she needs more games for Nintendo (as a 3rd rep)
These are my thoughts at the moment.