Pretty hype, if it lives up to what the trailer showed. Since it looks much faster paced than brawl, more like melee (Thank god) with end lag looking reduced and potentially a different "Advanced" technique as shown here:
[spoiler] http://www.youtube.com/watch?v=DBUX-vemIvI [/spoiler]
It would be great if they had more techniques like this, reminiscent of techniques like wavedashing and SHFFL'ing.