the intro music should totally be Beginning Anew, http://www.mcleodgaming.com/music.php
or maybe as an alternate song that would play on the intro after you 100% the game, something like that

Sonic resprite.

I speculate that there will be taunt messages by the time the full game is released if not in beta

I speculate more flash effects in Peach's FS.

Speculating stamina mode.

I speculate that Final Forms may appear as opponents in Classic/1 player mode, probably only on Intense/9.0. On lower difficulties it could appear but you get allies. You could fight Goku in Classic but notice he has 2 Stock. After he loses the first stock he comes back as SSJ Goku. He'd get a high amount of Stamina that also functions like a damage %. As he loses Stamina he gets launched futher, meaning he can be KO'd normally. Also, to make it more fair you're automatically given an extra stock. It'd be identified as a Final VS match.

I got bored in 0.8a/b and tried playing with Smash ball on vs Goku or Ichigo, only attacking when they're in Final Form. They work surprisingly well as boss battles. They're like fighting Melee Giga Bowser but can't be cheesed or gimped. I think super versions of characters are more fun to fight then bosses like Galleom/Duon/Tabuu.

I speculate the 1 player mode bosses will probably mostly be super characters(Smash Bros. Moveset rather then giant character like Brawl).

Spirit Bomb

Forgot to mention that. That's the main annoyance of trying to fight SSJ Goku 1v1, the AI use it fairly often. If they have him in Classic/1P he'll have Spirit Bomb disabled(No Down B). Another thing, mostly for Super Sonic, is they'd be unable to accidentally SD by moving into the side and top blast lines like in older demos.

I speculate that the CPUs will be much harder.

I speculate all star mode

Ok there are alot of ideas that could be used for this game.
I would love to see mega man from the battle network series I see so many moves and smash attacks that could be used as well.

Next is another Nintendo character from a old 80s show call caption N. Caption N would be so fun to use and his smash could tie in the other characters from the show assisting him.

Next I would like to see kirito from sword art online. Just watching the show smash attacks and moves would be fun to make as well as use in the game.( sorry if the dudes name is spelled wrong)

Next I would like to see Jack and Dexter. I have had a vision about console company's coming together and out of playstation these two fit to me. Moves from games and the ego power would make him an enjoyable character for the game.

Next I would like to see paper Mario. This game was fun as hell as a kid, I mean it reminds me of old Mario rpg. Moves from the game would be easy to make and for one we could use the Awsome hammer that we want so bad for paper Mario to use. I feel he REALLY needs his spot here on ssf2.

Next would be mallow from Mario rpg. He is way easier to make than Geno.I mean believe me Geno would be awesome but his sprite work would be hard to do. Mallow is another magic user and smash needs that bad. Plus mallow teaming up with black mage would be killer.

Next is hard to ask cuz the work to make this guy would take time. Solid Snake! I'm a big metal gear fan and really liked him in brawl. Having snake bake would be a hell of a wish come true for me.

Next would be Liquid Snake from metal gear. If you put snake in why not his brother lol. Making the moves would take some creative ideas.

So far that's my thoughts but the list could go on and on lol

Nice Ideas but if you want to suggest characters than there's a separate topic for that.

Awww man really well at lest the idea's are out of the bag

Speculating Trophy Shop and having Special Modes not apply to all characters
(Like fighting against a Giant opponent using a Metal character, for example)

I'd like to see the "Wee" turnip from 0.7 make a return.
Just make it rarer than a bob-omb.