Thanks for the clarification.
I started reading comics in the early 90's, so I vaguely remember the old guys being aged up in Zero Hour, but I didn't know the characters, so it didn't mean much to me at the time. I didn't remember their earlier disappearance and reappearance. Though now that you reminded me, I think I do remember hearing something about it, though I never read those comics. Of the JSA guys, the only one I ever really knew much about was Jay, due to his appearances in Wally's Flash series.