Perhaps, wait until the show the full roster before freaking out?
They don't need to show everything in a demo.

To be honest I'd be alot happier to see a UbiSoft Smash bros without the TMNT. Or maybe two turtles in the list of playable characters. Have the main characters from SplinterCell, Ghost Recon troops, Rabbids ,Prince of Persia, Assasins Creed, Rayman as well as some of the other liscensed characters UbiSoft has at their disposal.

This game looks great except for the fact that I don't care for the Ninja turtles, so I won't be buying it. But UbiSoft has the right idea! Just ditch the turtles and replace them with in house or other liscensed characters!

Lol.  I think if you want to find one you would have to buy the version called Mario Kart Wii.  There is no standard version of Brawl that has a working online.

I'm honestly not to thrilled about this. I'll probably still pick up the game because I'm a huge fan of brawl, but I think it should be limited to the TMNT universe.

Usagi isn't part of the TMNT universe either, but the because both comics were at the same publishers the writers mixed it up a bit. I would still want Usagi Yojimbo in my TMNT even though he doesn't belong. 

http://en.wikipedia.org/wiki/Usagi_Yojimbo  

http://en.wikipedia.org/wiki/Teenage_Mutant_Ninja_Turtles_(Mirage_Studios)

So Ubisoft gets the TMNT license and decides to add their own characters to the game. Really? There had better be every TMNT character I can think of in this game then. If not, then those Rabbids were a waste of time.

What's with the glow around all the characters? I'm not a fan of that either.