How do you think he'll go? Is this a good thing given that he suffers from Parkinson's Disiease?
I think it will do well. If he is playing the part of someone with Parkinson's any difficulties he experiences will be part of the character.
Perhaps he could host a chat show ?
I feel that it would do a lot for sufferers of diseases such as this, much as Christopher Reeves did a lot for those who were severely incapacitated. Anyone who lives in public life with a disability does a lot to raise awareness of said condition, and also shows what can be done. 'Tis one reason I like the Paralympics more than the regular ones. These athletes have decided what they CAN do and not what they can't.