what caused the concussion or how permanent (if at all) its effect will be.
Oftentimes concussions--if given the proper healing time--heal completely w no lasting effects.
There's no good reason to think Beau can't go for us next season or beyond. Not yet, anyways. If it were something Beau & his family were strongly entertaining I think it would've gotten out by now. The total silence suggests to me that he plans on returning when he's ready (& that very likely might not be till next season).
mutu.