I didn't watch the SA game, but I am no less disappointed at hearing how he played. Very disappointed.
I also wasn't aware that he was going through a divorce. Hell, I didn't even know he was married.
http://www.oregonlive.com/clackamascounty/index.ssf/2014/09/portland_trail_blazer_nic_batu.html
I am thinking deeper beyond his probable injuries on this. Nic loves France with a passion (I can't imagine he'd play for them in the Summer if he didn't). I think that there's a possibility that the terrorist attacks there have left him a bit psychologically off as of late.
Let's also remember that last year, he played most of the season with a broken finger (just remembering him straitening his finger out after each shot made me cringe). And it's possible, after that fall in December, that there very well could be deep tissue damage to his wrist and back. Or nerve/ligament damage on his wrist at the very least; something not picked up on an X-ray.
A worse possible scenario may be that he's turned to drinking. I consider myself to be pretty good at spotting folks who have drinking problems (my whole family are sobered alcoholics), and I've been right before when spotting them. He just has "that look" about him; and unless you've seen/known alcoholics/drug addicts, it's hard to describe.
It could also be that he's sick with disease, and doesn't want anyone knowing about it; thus we haven't heard any rumors about it. This would also be a worse-case scenario.
However, all that being said, he likely just needs a few weeks vacation. Maybe some of his mother's home cooking is in order.