He is still great on the mic and has excellent charisma.. He would be a massive upgrade over Booker for SD Commentary.. he could be Christian's manager.. maybe some sort of authoritative figure ala a GM
Personally I would like to see him stay involved with the Christian/ADR feud as Christian's sidekick
For now he should relax, he was pushing some intense matches before this news came up. And when the doctors heard ladder match at ER, they must have been like "fuck that" I hope he doesn't have a meltdown of any kind.