You definitely won't need to worry about advertisements. Hardly anyone (prolly even less than Wii) knew about DS before it came out. I'm sure it'll be advertised very well. Just as I'm sure the PS3 won't advertise well, as with PSP. Yet everyone knows about it anyway.
Either way, the Wii is already very well know anyway, it's already really popular across the globe, & many shops are supporting it very well.... they used to have PS3 posters in GAME, with certain GAME stores having 1 Revolution/Wii poster, now I don't see PS3 posters than often anymore, & most GAME shops have at least 2 Wii posters, so.... Don't worry about that.
As for the software, they're doing the right thing, they held the secrets of the console just long enough for Sony to give up copying them (almost, they still had time to tack on a rotation sensor) & they've done a great job in getting people used to the idea of the controller& the games, E3 2006 is a great example, most people couldn't be any more happy with it. Most people's only problem with it was that we got no footage of Super Smash Bros Wii..... but the very next day...
You see what I mean, Nintendp have done very well with the run up to Wii & Christmas, except for the fact the DS has been very dry, I'm not complaining though, gives me time to save up for the next big Nintendo console, only happens once every 5 years, so no biggie.
Also, the launch is actually pretty good, once you remember that it was still pretty recently (in the last year infact) that most developers finally got their final Wii dev kits, I'm sure next year we'll see tons more brillinat projects with graphics we had never imagined could happen on Wii, Red Steel even looks alright for a console of only 1.5-2 times the power of the GC.