Originally Posted by
Stingo
Excellent question!
In 1986, Roy Thomas wrote a one-shot special called The Last Days of the Justice Society of America. The Powers That Be in '86 decided that the Golden Age characters, specifically the ones that had modern day counterparts, would be too confusing to newer readers. Roy was thus tasked with writing finis to Ted, Alan, Jay, Rex, etc. The characters were banished to a never-ending battle in Ragnarok, with the fate of the universe depending on their eternal battle.
In 1992, DC opted to bring Ted and company back (sadly without Roy Thomas). They officially returned to 1992 DC courtesy of John Ostrander's Armageddon Inferno 4 part mini. The group then chugged along in a ten issue ongoing and various and sundry guest shots in other mags until being unceremoniously written out again with their Zero Hour event. Ted was aged during this to be more reflective of his true age and this is when Jack stepped in.
Hope this helps!