I can't imagine that they would go through the trouble for Wilson's brother (and I can't imagine that storyline being *that* big). We've been told that House is going to suffer some sort of breakdown and TPTB have said that the first few eps of season 6 are going to break from the usual format, so to me it makes sense that he is going to be the one in the psychiatric hospital.

Besides, I just saw a picture of Hugh at JFK Airport in NY. I'm thinking he's there to shoot some location scenes.

Looking forward to seeing what they do with this!