I think it's simply down to overexposure. Especially on the movie side, he didn't need to be in almost every movie musical of the last few years - actually, almost every movie musical that flopped critically, if not commercially. It just made him a poison pill, and we all knew with each casting how it was going to go.
Listen, he is talented, and I think with a suitable amount of time away and some smart choices - assuming he can learn to say no at some point - he will be welcomed back, as Anne has been.
That said, I wonder if he should stay away from theatre for awhile. When the main focus of your overexposure is musical theatre-related, the smart thing would be to back to regular comedy.
"Hey little girls, look at all the men in shiny shirts and no wives!" - Jackie Hoffman, Xanadu, 19 Feb 2008