Gonna go ahead and add my own two cents.
http://www.youtube.com/watch?v=BgmC56ndgeg
First of all, Utilt looks gorgeous imo. Just look at not only how long this thing is but how low Greninja crouches during it:
Not to mention that what is seemingly ending lag may very well actually still have a hitbox out:
(1:33 for clip). Looks like an overall better Pika Utilt to me. Also, if there are combos in this game, it looks to be a perfect combo starter.
Next, I'm also loving how Water Shuriken looks. At 1:50, we get a good example of Greninja charging and releasing a full charged one as well as a smaller one immediately after. More importantly, we see a distinction made between both. The smaller one is (I think) slightly faster, but it has minimal knockback (as expected).
The large one, however, hits the opponent
multiple times. While I'm sure this could be DI'd and whatnot, it looks like it'll do a really good job of pushing opponents back, especially since it's pretty fast itself.
The clip just before that (at 1:45) shows that Greninja's Usmash is very similar to Sheik, but it may have a surprising amount of ending lag (but likely more overall range). Hopefully it's just as strong.
At 1:52, we see Greninja doing some sort of diving motion, and I can only wonder what that is; it couldn't be a helpless state as it was shown when the Villager entered one, he flashes as characters did in the previous games.
Finally, at 1:55, I feel that's honestly a dash attack and not a Dtilt, given the end lag and momentum at the end, but it could be either.
On to the other moves in general. Fsmash looks like it comes out really fast (2:05) with a little ending lag. His Ftilt is obviously nothing to write home about. His Dair looks like it will function like Wario's Dair in P:M, coming out of it the moment it hits someone (probably supposed to be Bounce btw). Also, all that disappearing stuff looks cool, and his Up-B looks like a shorter version of Pika's, but it keeps the end momentum (1:42).
He has a pretty cool looking crawl and low crouch (2:02) as well as a nice, low what I can only assume to be his standing animation (2:09).
Lastly, his movement in general looks amazing. Fast ground
and aerial speed with what appears to be really good jumps and some floatiness thrown in (not unlike Brawl Yoshi in that sense, but not quite as mobile if I had to guess).
Edit: Forgot to mention that it looks like the multi-hit part of his jab looks disjointed/a projectile, and it's very likely his Fair, Fsmash, and Usmash are disjointed (and maybe hopefully dat Utilt). Also, that roll looks really good as well, given how fast it is.
Also, here's a Gamexplain video, pointing out a couple of interesting things some of us have missed:
http://www.youtube.com/watch?v=OLDHZGnhSGc
