Too scary? Sheesh. I doubt it could be as grim as Gargoyles... make it a night toon as a double feature with that show.
Wait a sec... how could they pull of an Atlantis cartoon? Milo's gone, and the rest of the crew were comfortably rich and able to pursue their dreams. And a prequel show would still eliminate Milo. Maybe it's better this didn't surface.
...odd that they'd cancel it in the middle of production, instead of just finishing the episodes they shipped overseas in an attempt to recoup Disney's investment in the series.
You read it... you can't un-read it!