I haven't really heard anything about him in some time, and the 'knee soreness' explanation seems particularly obtuse, even for the normally secretive medical staff.
As a fan, I would welcome any news of his pending return, or at the very least, an actual diagnosis on what the problem actually is. I recall hearing of players with similar conditions that did not miss a whole month.
My best self hopes this isn't part of some looming deadline trade, but until I see something close to concrete regarding a return time table, it's impossible to put those thoughts to bed in my mind.
Also, the offense is at least partially designed with him in mind, and the Bucks are substantially less fun to watch without him as a result.
I now invite you all to posit whatever crackpot theories and pontificating comments relating to this matter below.