Bethesda's vice president of Marketing Peter Hines shot down hopes for a Wii port of Oblivion in an interview today. Taking Oblivion's rich and vast world into consideration, it would be perfect for the unique control capabilities of the Wii. But no, Hines said that it's something they'd like to do, however the Wii isn't designed for the level of graphics processing and raw horsepower that Oblivion uses.
Still, Bethesda thinks the Wii is a great console, so it is possible we may see another original title from them in the future.
Still, Bethesda thinks the Wii is a great console, so it is possible we may see another original title from them in the future.