My guess is he has a good chance.

I recently saw a thread (on a different forum) where someone had a corn snake that had gotten stuck in its enclosure while they were away on vacation. Apparently the snake looked really bad when they found it. The thread I saw was pics after it had healed, but had a lot of discoloration and scarring (if I remember correctly, a year had gone by). I think the pics of the healed corn look worse than this guy does now.

Here is a link to that thread:
http://www.cornsnakes.com/forums/showthread.php?t=80828