I'd love to see Shulk and a Dixie/Diddy team...
Balloon Fighter would be cool...
So would Mach Rider...
I always thought it would be cool to see a Wolf Link/Midna team too...
I wonder if this SSB will have DLC...

Oh lol I should get started on mine.

1.Mario (He'll be in there)

2.Link (him too)

3.Kirby

4.Zelda

5.Marth

6.Guy from "X" (unlockable)

7.Redesigned Pac-man

8.Chrom (Come on they'll replace Ike)

9.Captain Falcon

10.Fox

11.Ghirahim (unlockable)

12.Ganondorf

13.Olimar (unlockable)

14.Pikachu

15.Samus

16.Yoshi

17.Pit

18.Donkey Kong

18.Bowser

19.Luigi (Unlockable)

20.Game and Watch

21.Gen 6 Pokemon to replace Lucario

22.Ice climbers

23.Ness

24.Kazuya from Tekken (hey it COULD work)

25.Megaman

26.Sonic

27.Kirby

28.Rosalina (Actually want her to replace peach. Just my opinion)

29.Wario.

30.Meta Knight

31.A FF character (Or any Square char in general)

32.Toon Link

33.Peach (Gonna be in there anyways)

34.Falco

35.R.O.B.

Honestly, as long as they have a few new characters, no clones lazy clones (although Brawl seems to have done away with that) along with Ness, Marth, Samus, Kirby, Luigi and Captain Falcon I could care less who gets added or dropped.

If they added Kefka, I would purchase a WiiU.

I'm ok with Maps and some extra mission DLC.

 Paid Character DLC on the other hand will cause unprecedented rage. 

From the Mario Series;
1. Mario
2. Paper Mario
3. Luigi
4. Yoshi
5. Peach
6. Bowser
7. Waluigi
8. Toad
9. Birdo

From the DK series;
10. Donkey Kong
11. Diddy Kong
12. King K. Rool
13. Cranky Kong

From the WarioWare Series;
14. Wario

From the Zelda Series;
15. Zelda
16. Link
17. Ganondorf

From the Pokemon Series;
18. Pokemon Trainer A (Red/Dawn, interchangable by costume change) (Pokemon Team; Serperior, Empoleon, Charizard, )
19. Pokemon Trainer B (Gold/May, interchangable by costume change) (Pokemon Team; Sceptile, Feraligatr, Fennekin's final form)
20. Pikachu
21. Mewtwo
22 Jigglypuff

From the Kirby Series;
23. Kirby
24. King Dedede
25. Meta Knight

From other assorted series;
26. Mii
27. Olimar
28. Ice Climbers
29. Mr. Game and Watch
30. Captain Rainbow
31. Chibi-Robo
32. Sonic
33. Pit
34. Samus
35. Captain Falcon

1 - Mario
2 - Luigi (w/ Poltergust!)
3 - Bowser
4 - Peach
5 - Yoshi
6 - Donkey Kong
7 - Diddy Kong
8 - Wario

9 - Link (alternate costumes cover Toon Link and the like, who would not have different movesets)
10 - Zelda/Sheik
11 - Ganondorf

12 - Kirby
13 - King Dedede
14 - Meta Knight (tbh, I can't let him go just because of that music)
15 - Samus
16 - Pikachu
17 - Mewtwo (Lucario and/or others would be alternate costumes with the same moveset)
18 - Jigglypuff (just can't get rid of that one eh?)

19 - Ness (Diet Ness... I mean, Lucas is downgraded to an alternate costume)
20 - Ice Climbers
21 - Mr. Game & Watch
22 - Marth (Ike/Roy/Crom/what-have-you become alt costumes)
23 - Fox (Falco & Wolf also downgraded to alt costumes)
24 - Captain Falcon
25 - Olimar
26 - Pit
27 - R.O.B.

Now it can finally get interesting.

28 - Sonic
29 - Mega Man
30 - Vaati
31 - Ghirahim
32 - K. Rool
33 - Magnus
34 - Fiora (picked her over Shulk because I think the double blades could be interesting and we need more chicks!)
35 - ......hell, alright, let's get Ridley in there.

I think (and hope) the development team will shrink the roster.

So I'll work with a smaller list.

First off, the elite eight:

1) Mario
2) Link
3) Samus
4) Donkey Kong
5) Yoshi
6) Kirby
7) Fox
8) Pikachu

Next, the new challengers:

9) Captain Falcon
10) Ness
11) Luigi
12) Jigglypuff
13) Dr. Mario (please bring him back!)
14) Zelda
15) Peach
16) Marth
17) Pit
18) Bowser
19) Ganondorf

And, finally, the rookies:

20) Lloyd Irving
21) Little Mac
22) Samurai Goroh
23) Krystal
24) Geno
25) Zack & Wiki

shulk
shulk
shulk
shulk
shulk
shulk
shulk
shulk
shulk
shulk
shulk
shulk
shulk
shulk
shulk
tingle
shulk
shulk
shulk
shulk
shulk
shulk
shulk
shulk
shulk
shulk

Old & New Sonic.