Keep Circulating the Tapes: Despite its popularity, for the longest time, you'll never find Saint Seiya past episode 60 in english. In 2014 they are finally releasing another DVD set that finishes the Sanctuary arc creating hope that if sales are good, the Poseidon and Hades Sagas will be dubbed as well. But since the DVD release has been labeled as subtitled-only, that hope has become, it might be dubbed if it sells REALLY well.
While in Japan, all five Saint Seiya movies were released in a set, the US will only have a set that features all but Tenkai Hen in it in 2013.
Playing Against Type: Mitsuko Horie as Hilda. Prior to that, she had played only cute girls and had a career as anime OP singer, and then she's hired to play the Brainwashed and Crazy Princess of the Nibelung... Mrs. Horie herself lampshades the trope when she's asked about this in interviews, recalling each time how shocked she was when the role was offered to her.
Promoted Fangirl: Shiori Teshirogi, the author who writes Saint Seiya: The Lost Canvas, was actually a shoujo author who once met Kurumada. Saint Seiya was always her favorite series and she jumped at the chance of making a new story when Kurumada pitched the idea to her, and what was originally thought to end up being a rather brief series has exploded in popularity.
Ikki and Tatsumi despise each other, but did you know that the two actors who play them, Hideyuki Hori and Yukitoshi Hori are really brothers?
If a man sees an Amazon's face they either have to love them or kill them. Seiya and Shaina were forced into this dilemma, but in real life, Tōru Furuya and Mami Koyama did get married. Unfortunately it failed but they are still friends.
Troubled Production: The Hades Saga: Inferno and Elysium. Kurumada was so upset with Toei that he fired all five of the Bronze Saint voice actors,casted new ones, and got another studio to do the animation that was so bad that most of the scenes were mostly traced from the manga.
In the manga, Scorpio Milo was to be Hyoga's master. In fact, if you look closely, you can see the outline of Milo and not Camus◊. This probably explains why Milo was shown early on speaking to the Pope as well as the attack that sank Hyoga's mother's ship resembled a well-placed Scarlet Needle. Image taken from Mu's Corner.