Results from a few early Brawl tournaments in southern California:
Champ Combo Pocket: 1. Gimpyfish (Metaknight); 2. DSF (Olimar); 3. Champ (Snake/Fox); 4. PsychoMidget (Snake).
Smash at Noho 3: 1. Gimpyfish (Metaknight); 2. Blitz (Zero Suit Samus); 3. Nes (Peach); 4. DC (Marth).
Chapman III: 1. Gimpyfish (Metaknight); 2. PsychoMidget (Snake); 3. DSF (Olimar); 4. Lucky (Marth/Sonic).
Chapman IV (pending): 1. PsychoMidget (Snake); 2. Gimpyfish (Metaknight); 3. DSF (Olimar); 4. C0nn0r (Marth).
It should be noted that almost all the players above have imported copies of Brawl and thus are able to practice much more than the other entrants, with the exceptions of Gimpyfish*, Nes, DC, and C0nn0r. But we can clearly see a good amount of consistency from players like Gimpyfish, DSF, and PsychoMidget, and it's also clear that good Melee players are performing well in the new game (Gimpyfish, DSF, Champ, Blitz, DC, and Lucky all being current or former members of the SoCal Top 25 rankings).
That doesn't mean new players won't be able to compete, of course. We expect to see a TON of amazing players who never played Melee competitively!
*Yes, Gimpyfish is that amazing.