The movie's overarching message is about learning what it means to be a real hero -- as opposed to a celebrity.
Hades is a slimy, terrifying guy whose sharp teeth and hot temper are likely to frighten the youngest viewers. Hercules fights monsters, decapitating a hydra from inside of its long neck, only to watch it grow a bunch of more heads and attack him. Dead bodies are shown in the underworld and dying people are shown floating in a sea of death. Apocalyptic scenes, characters in peril.
Meg is forced to handle Hercules "like a man" if she wants her freedom. Hercules and Meg share a couple of long kisses. Phil spies on nymphs swimming and chases them.
Taunts/insults -- "freak," "sweetcheeks," "yutz," "Jerkules" (instead of Hercules), etc.
When Hercules gains popularity, he gets a credit card with his name on it; there's also a Hercules store with lots of Hercules dolls on the shelves, and kids wear Air Herc shoes and drink Herculade. In other words, success means having your name on lots of products.
Drinking, Drugs & Smoking
Hades smokes a cigar and drinks a martini when he celebrates success.