Depends on quite a few things.
technical abilities of the console, the controls, the online play and the userbase.
The Wii is already getting many 3rd party titles. It's just that many of them are shovelware games, which in this case unfortunately are cheap to produce and undoubtedly have its fanbase.
I understand very well why big companies release their blockbuster titles on the HD consoles and almost only feed the Wii with cash-in titles.
Good for the company, not so good for the Wii owner.
As long as the Wii userbase don't truly support 3rd party big budget titles they won't see much more of them and unless the userbase off the Wii 2 can prove them wrong I don't think the support will get any better. A big budget title is supposed to make massive revenue and if it only breaks even or sells 1 million on the Wii it's simply not enough. It's far more efficient to release 3 or 4 low budget games. Smaller teams, lower budget, but about the same revenue.
