I'm happy with any love they show to the classic sonic games. Hopefully this is an indication of a sonic 3 level! Regardless though, smashbros.com is almost an alternative to ocremix now becuase of all the songs, albeit with less quality and quantity
I dont think they'll replace trophies because sakurai says "They'll be easier to find THAN trophies" or something along those lines, so my guess is that trophies will remain in the game. After all, thats the premise of the single player mode right, trophies?