I personally like the game but I think its extremely overrated. I didn't find it too strategic back on the GC, not a lot of moves in the game let alone combinations. It's only a matter of timing. Either way I loved SSBM, but it never really even crossed my mind when I was getting my Wii ( on Nov 19 ^^ )
It's a very basic game as stated earlier, and im sure since most of the players on this game will be bunch of little kids, we'll be seeing a ton of button mashing online.