Many others, the list varies.
These characters were created in the Golden Age in the 1940's and later cancelled. But this is a much later story when they had been brought back. DC originally started resurrecting it's Golden Age characters in 1961 (Flash 123) mostly placing them on an alternate Earths, Earth II and others. Thus began the DC multiverse, which was destroyed in Crisis on Infinite Earths (1985). This being after that, event they had to rearrange the back story of these characters since Earth II had never existed. Then of course the multiverse was partially restored in Infinite Crisis and who knows what might happen to this in Final Crisis. ( A name sure to be made false. No way is this the last crisis. I suppose that could just call them [quote]a stage in a sequence of events at which the trend of all future events, esp. for better or for worse, is determined or turning point[/quote] in the future but that won't fit on the cover! lol
So don't worry too much about the continuity of these characters, just enjoy them, wether the events in this series ever happened in the current DC Uninverse, is beyond me and might change anyway.
Trivia from wikipedia "The first known use of the term "retcon" was by Roy Thomas in the letter column of All-Star Squadron #20 (April, 1983". How appropriate.
Click on this quote for more info.
Created at the request of the President, the All-Star Squadron was a group of super-heroes which operated from New York for the duration of World War II. Co-chaired by Hawkman and Liberty Belle, it counted as members almost all mystery men and women active during the period. The Squadron had links with other organizations: Plastic Man served as the group's liaison with the FBI, and Uncle Sam led a small group of heroes to become the Freedom Fighters, operating from Washington DC. There was also a 'junior' division, the Young All-Stars, created to give younger heroes a place to belong. Prevented from fighting on the main fronts of the war, the All-Stars concentrated on thwarting saboteurs, fifth-columnists and other enemies of the state on U.S. territory. The group lasted only as long as the war - when hostilities were ended, the individual heroes and teams drifted apart to fight crime and other evils in their own ways.
Here's some more info from Toonpedia
My initial seeding may be a bit slow on this except M-F 8:30-4:30 GMT -5 (US Eastern time)