I can't see how people are thinking that Metaknight is a clone of Kirby. Is Gannon a clone of Link? Bowser, a clone of Mario? Mewtwo a clone of Pikachu? No. Metaknight and Kirby look completely different. Metaknight is bigger. He has a friggin' sword. There's a video of him attacking with his sword. That appears to be his primary weapon. Kirby kicks and punches and sucks. The only "sword" is his Up-B (which we know remains the same).
On another topic, is anyone else concerned that Pikachu and Kirby are still going to suck this game? From the video, it looks like it. It seems to me that they're moves haven't changed whatsoever (the only move that was changed for the original 4 was Link's forward-A in the air - it now swings twice, as the video shows). It showed Kirby's forward-B in the air - his weak-*** hammer yet again. I'm concerned that Kirby's forward B (as is Pikachu's skull bash and other attacks of the sort) will remain completely useless, and thus decrease their potential. I was really hoping that all characters would be somewhat equal - it makes for a better game. But right now, I'm concerend that that won't be the case. We'll see, though, we'll see - right now it's way too early to tell.