Board Thread:Spoilers!/@comment-11464223-20131109183236/@comment-5235494-20131109185813

Considering that the box itself appears, Pandora herself will be described at least to some extent - possibly showing a flashback of either a mythological Greek world or the Enchanted Forest long before many of its inhabitants existed (with the exception of Rumplestiltskin, possibly, because he has it in his possession. Although, he may have just acquired it in a deal, so who knows?)

If Pandora and King Midas exist, and there was mention of a Pegasus in "Good Form" as well as the Siren in Lake Nostros, obviously other Greek characters must exist (like the gods, Odysseus, Penelope, Telemachus, Circe, etc.) Perhaps Scylla and Charybdis will be later threats, and considering as there is already a Netherworld, why not an Underworld?