It will probably do really well online, but it won't create a online wii community. I don't really see how it can be a community in utter silence, with no knowledge of who anyone is. Don't get me wrong, I'm getting smash day 1, and will play it online every night, but it's not going to have it's own online community. There will no doubt be a VGchartz Smash community, a gamefaqs community, a smashboards community ect. But without any actual online communication, and everyone but your friends being nameless, there won't be an individual online community within that game. If you want friends online in smash you have to find them somewhere else, and then play with them. The communities will have to create themselves in certain online locations seperate from smash or the wii.
You can find me on facebook as Markus Van Rijn, if you friend me just mention you're from VGchartz and who you are here.
