And, if I'm not mistaken, this past year was like the thirty-fifth anniversary of that classic three-part adventure! A gigantic claw-like hand, made of some unknown energy, was threatening to crush the Earth from outer space. And, a cosmic entity named Oracle (no relation to Barbara Gordon) was magically summoned by the Golden Age Dr. Fate, Johnny Thunder's pink Thunderbolt, and fishnet-era Zatanna, to provide answers for its destruction.
Turns out the 7SV had faced a similar menace, whose destruction sent them to different points in time. The Star-spangled Kid ended up in the Stone Age; his adult sidekick, Stripesy, in ancient Egypt; the Crimson Avenger, in pre-Columbian Mexico; the Golden Age Vigilante, in the Old West (apparently before Lewis and Clark); the Shining Knight, in Mongolia with Genghis Khan; the Golden Age Green Arrow, in Sherwood Forest; and Speedy, on Circe's ancient Greek island (as a centaur)!
Of course, that classic adventure has been considerably revised since then. But, it was nice of Warner Brothers and Cartoon Network to do this episode as a tribute to them.
Btw: in the 1940's, Captain Nazi was the green-and-yellow-clad nemesis of the Golden Age Capt. Marvel. And, General Eiling's mutated form? The animated version looks more like a buck-toothed clone of the early Silver Age Hulk, from Marvel Comics (rather than a bald Shaggy Man).