Who doesn't already know the full roster? Even then, who is honestly concerned about "spoilers" concerning hidden characters? Especially in a thread with screenshots of them? I'll just go now:
R.OB.'s in, Wolf's in, Wind Waker-based Toon Link's in, Lucario's in, Snake and Sonic are hidden, Jigglypuff's in, Captain Falcon's in, Luigi's in, Ness's in, Marth's in, Mr. Game & Watch's in, Ganondorf's in, and Falco's in.