No chance. It won't happen until the end of next year at least. They'll just keep bundling stuff at the $149 price point.
Look at it this way... the lower the price of the Wii is, the more expensive the Wii U will seem by comparison. They won't risk taking away sales of Wii U as well by making the Wii more appealing. Just like they didn't do a price drop on the original DS before the launch of the 3DS. Why would they take sales away from their next console?