ok here is more of my crazy predictions..
1. Ridley won't be playable in normal multiplay.. he will be a mini boss, a AT, and he will be playable in a new extra Boss Play Mode.
2. There will be a SimCity stage where the characters are Godzilla sized.
3. Animal Crossing's K.K. Slider will be a AT which is useless.. He only plays his guitar. His effect turns off the music for a certain time period while he plays a random song. "Totaka's Song" will be allot like Mew appearing rarely in Melee.
4. Master Hand will use a paint brush and fly swatter in parts of the final battle as a new attack from Mario Paint.
5. There will be 3rd party items and ATs.
6. There will be a Zelda: OOT themed stage. My guess will be either a combination of all the areas from OOT or a remix of the Hyrule Castle n64 stage.
7. To get more ATs you need to c
ollect AT trophies for the trophy gallery.
8. There will be a gameboy stage which plays allot like the game and watch stage. The stage environment changes like the Pokemon Stadium stage.
9. The Duck Hunt Dog will be either a AT or Playable character.
10. Expect to see Hanafuda playing cards in some shape or form.. (Master hand might throw these.)
11. Tetris blocks will be a AT.
12. There will be more special unlockable normal trophies if you own a 1st or 2nd party Nintendo Wii/Virtual Console game.
13. Mii's will be playable and ATs.. and will have their own stage.
14. Super Mario Land & Super Mario Land 2 will be in Brawl in some shape or form.. (Item, Map etc.)
15. One or more of the stages will take place on a Nintendo console or handheld.
16. There will be a Wii themed stage. If players have a SD memory card with photos in the system.. the photos flash up on the screen in the backround or in the environment.
17. Mike Jones from StarTropics will be playable or a AT.
18. Wart from SMB2 will be a AT. His effect is his vegetable organ from SMB2 which spews vegetables all over the stage.
19. Even if a character from a game series isn't playable, it doesn't mean a themed stage from those games won't be playable. For example.. (Animal Crossing or Pikmin)
20. Expect more boss fights.
21. All N64 stages will be unlockable.