Anyways, my mains in Brawl are already confirmed, so I'm more interested to see what the roster might be and secretly hoping for a 48-50 character roster (We're at 29 right now, it could happen!).
But I still am far more interested at this point in stages. We've had a lot of items revealed, a lot of characters, but actually very few stages. There are far more items than there were Brawl that are already confirmed, looks like there will definitely be more characters, but stages we know dreadfully little on.
Brawl had over 40 stages, and right now we know 15 stages for the 3DS version, and 14 for the WiiU version (and these two numbers include Battlefield and Final Destination). Outside of music, it's the thing they've been the most hush-hush on.