Dng, that video is horrible Opossum. Replacing Ridley with Sylux is just plain... not logical. At all.
I remember when I made a video prediction, people ragged me for not including Toad (which I didn't mind too much), Waluigi, Master Chief (why would you want that soulless, stupid Samus clone?), Tingle, and Daisy. Seriously... why would we need the latter 3? What in the heck do they ever do, ever?
Seriously, some guy who made a very popular character prediction video on youtube went after me on my video's comments for excluding Waluigi in my Brawl roster, trying to destroy my logic as garbage. Well... I guess time and patience does reveal many truths!
As for that guys' actual roster, let me break it down:
Waluigi - Not deserving of a character spot; make him an Assist Trophy again, and a Luigi/Mario/Wario alternate outfit.
Daisy - Already a Peach alternate outfit. Maybe since she was in Super Mario Land 2 she could be an
Assist Trophy, 2 (just make her look way different from Peach's Daisy outfit).
King Boo - He's an even crazier choice than Waluigi or Daisy!
Claus - While I like him, he's still a Lucas alternate outfit. Could make an epic boss, though.
Crash - Next to no chance (technically he is now a 3rd party character, as is Ratchet and Clank! o.o)
Sukapon - WTF character is his only shot.
Sylux - A far-fetched choice. He could make a future Metroid appearance as hinted at the end of Metroid Prime 3, but Ridley, Dark Samus, and heck, even SA-X and Kraid are more likely!
New Pokémon Trainer - LAMEEE!!! Stick with the current one, or at least keep it within the First Generation!
And no Jiggz is fail!
This video doesn't have too many 3rd party characters, which is unusual. Most youtube prediction videos have like 20 trillion 3rd party characters.
And seriously, Doc Lewis is awesome. Have him as an Assist Trophy... or somethin'!
He could train you, or perhaps give you motivation!
Maybe make his ability to heal you by patting you on the back a secret part of his assist trophy character appearance!