I think that some characters will have multiple final smashes.

This.
EDIT:

This too.

Don't really think that's necessary.

Also people would probably be really mad if they did it for some but not all.

This. I know I'd be one of them. Due to my major need for it to be even. Hence why Wario having 12 colors and a few other characters having 5 instead of all of them having the same amount drove me mad.

Well with talk of customization options we may be able to be able to assign one of several Final Smashes

Reminds me of getting the Unite Vent card in KRDK... You then get to choose Strike's (Google Kamen Rider Dragon Knight Wii to get what I'm saying) finishing move, and even activate the card in battle for a brand new unique move.

Okaaaay, I was just thinking it could work like Crusade's method; choose it on the title screen like it was a seperate costume or color.

Most awesomest idea ever that will never happen in SSB4-Character creator.
DING! All roster problems solved.
Of course, the voices for the characters would be hard to program...
Maybe writing a word and the game will recognize it... different pitches of voices... the ability to edit pronunciation...(example-You type Sneasel. The game pronounces-Snee-sell. You edit it to say Snee-zel.)And of course, a awesomeness bar so you don't make a indestructible character and the ability to add elemental effects to attacks, and make the series symbol or use a existing one.
And, of course, everything would be controlled by touch screen.
...Not that this will happen, just pointing out what an awesome thing it would be.

Yeah, that's not gonna happen.
Possibly ever.

Actually, they have talked about customizable characters from the 3DS version that you can upload to the Wii U version, so a character creator is not out of the realm of possiblity. Although it definetly won't be that complex, the voice thing for one, why not just have a bunch of premade voices that you can adjust the pitch of, instead of making things that complicated? Infact, why not just have everything premade, and have it where you just choose out of those things with some customizable options like character creators for other fighting games?

Noooooo they didn't. Sakurai briefly mentioned that he wants some kind of connection between the 3DS and Wii U games, and something about customization on the 3DS that you can port over to the Wii U. That does not necessarily mean a moveset editor is in our future. At the very most it might be a palette editor.

multi-directional final smashes
just like how there are different special attacks for each direction
seems reasonable in my book and it would make up for some final smashes being useless/situational

alternately
different colored smash balls that give different types of final smashes

Are you sure about that? That sounds like you can make your own characters to me.

I hope that doesn't happen. There are too many things to choose (race, attacks, final smashes, etc.), and it could make complicated balancing issues for the developers.

Yeah, that could be a huge problem. Maybe they can have it where you can't use the character online or something.