Nice work by Frank Seravalli on Chris Pronger's status with the Philadelphia Flyers. The Flyers are required to pay out the contract, but as such a shrewd business operation, you would have to imagine that they protect themselves against injury with insurance. Plus, Pronger doesn't impact their future plans at all by hamming up the salary cap. No one gets hurt any worse, as long as there is a (wink, wink) continued attempt to get back on the ice in the future. We'll all just play along, stop asking, and wish Chris and his family the best.
In all honesty it's probably better for all parties involved if he doesn't come back.
For Pronger it's a quality of life issue and I'm sure his family is more important to him then hockey.
For the Flyers it's better to have him on ltir because if he comes back and isn't at least 80% the player he was and able to play a solid top4 role(which he was brought in to do) he'll be grossly overpaid on a team that desperately needs cap space the next few years(plus we don't know the effect the new CBA will have on things yet either).