GSP is really not that young anymore and time catches us all sooner or later. If he ends up being out of action for any length of time he should probably just stay retired.
He's the undisputed champion, the WW GOAT to date but if he's out for three years or something Im not sure he could make his way back to a title shot much less win it back.
"I fear no man, but Jim Harrison and Mike Stone are the two last men that I would wish to meet in an alley fight. Jim Harrison's fighting style is not flamboyant or spectacular, it's just simple and deadly!" - Bruce Lee