I think HBK is done wrestling full-time. I think somewhere down the road he will wrestle one more match. I think it will be against HHH.
I do think HBK is done for good. He won't ever come back and get into a fued with someone like a CM Punk for 2 months just because Punk wants to see if he can beat him. No I don't think HBK will ever do a fued like that.
I think HBK will make appearances from time to time like Stone Cold does. Who knows when we see HBK on WWE TV again. It will not be for a very long time (when i say that I mean like at least 8 months to 18 months) thats for sure.