Saint Seiya: The Lost Canvas has had it’s anime promo posted online. You can watch it here by clicking the link that says “special.”
The story is about Hades and Pegasus Saint before they became mortal enemies. Originally when they were call Tenma (PS) and Alone (Hades), they were friends. So this is about the War that was going on 250 years before the original Saint Seiya.
Maybe it will be a good anime adaptaion, we can only hope..