I found proof that Festive Odyssey is recessive to RockOpera!
My collection kitty which hides Festive Odyssey (You can see that in the first picture), just gave birth to a kitten with RockOpera (2nd Picture), so Festive Odyssey could hide behind RockOpera and that places it as more recessive than RockOpera.
The first picture does not tell much about Royal Sapphire because the eyes Burleigh passed could be the hidden eyes which I don't know.