Nintendo's Perrin Kaplan seems to think so according to one of her responses to a Game Daily interview.
When asked if the Wii would see a relaunch similar to the DS or GBA he said: Sure, absolutely. You'll see the ways in which we do that. The response is overwhelmingly definitive yet it is not yet clear in what context the console will be relaunched. There has been talk of DVD compatible Wii's and..