I'd be shocked. And even if somehow he came back, he'd probably end up just being the same pain in the ass he is now.
One thing about the Giants...they won't turn their back on Plax. Assuming he's not in jail, they will give him every opportunity to prove to them that he will change...
I won't be surprised if Plax comes back to playing for the Giants. I think they'll let him play when his problems just drift away