Trivia: As already noted, Hercules wears a lionskin which is made out of Scar. In the myths of Hercules one of his great tasks was to kill a vicious lions and he kept the skin ever since. But it's more than just a joke or a cameo that he wears Scar, for both Scar and Hercules were animated by the same man (Andreas Deja).
Trivia: Greek mythology has a Philoctetes. He is however not a sartyr who trained heroes, he is a human who gets bitten by a snake en route to Troy. Because of the stench from the wound he is left behind and Odysseus returns to pick him up towards the end of the war.
Trivia: During Meg's song, there is a shot with the Muses as five singing busts in a row, with the second one from the left broken. This is exactly the same as the singing busts in the Haunted Mansion at any Disneyland.