I know a lot of people have been saying that DK has remained mostly the same from Melee, but after watching this video I seem to think otherwise.
After maining DK for the past 6 years and becoming a master with him, I can tell the little differences. First off, his moves look like they all have a little bit of lag, but then come out faster. (kind of an oxymoron, I know but watch the DK videos closely and you'll see what I mean) What does this mean? DK's a bit faster. But then again, with the 'floatiness' that's been added to Brawl, DK should be a little bit more balanced out this time around.
And what about his final smash? Well, it's clear that DK has indeed drawn the short stick here...but it seems that it does have some uses if you know how to use it correctly. (but aren't most FS's like that?)
Also, if your opponents are at a high percent, it should be quite devastating.