They're about to come, maybe not this year, but somewhen when even the casual gamers had enough of all that casual games. Ubisoft is on a casual games trip, EA... well they're on a port trip like always. PS2->Wii. Bad... But as you probably know, Red Steel 2 is in development and it could really be a blast. Red Steel could have been far better than it was. In fact, Red Steel was the very first Wii game announced, but in the end it was a bit buggy and not that impressive.
But Ubi probably learned from this, Red Steel 2 is going to become better and will probably feature online modes ( remember the search for programmers with online gaming knowledge on the Ubiwebsite?)
Super Smash Brothers Brawl IS a hardcore game. No doubt. Even though it might look childish, the battles can be imense. As you probably know aswell, there are already Clans rising from the dust. BWii is a Multiplayer focussed game aswell.
But you're right, the Wii Online Mode won't be any competition to Xbox Live. But Wii Online doesn't cost a nut.