Sad news. We had a thread going a while back where someone else from Epic (strangely I had heard of their name before, but not this Mike Capps who is apparently the President of the company :rolls

was saying that they weren't planning on doing anything for the Wii. At least that gives them room to possibly change their minds in the future, this just closes the door and if they ever do decide to develop something for the Wii this statement will make them look silly.
Also, Epic aren't known so much for their games as their game engines. Surely programming for the Wii could open up some interesting avenues when it comes to making the most out of what you have available, which could help with their other work.