"They will need to have a professional Director so that the show does NOT end up like The Little Mermaid and Tarzan"
Um...as does every show...?
"They need a stunning cast especially Hercules, Meg, Hades, The Muses, and Phil "
I would assume that they would cast it as well as they could.
"Hercules needs more songs, Meg needs a huge song to belt out, Hades needs a song just like Ursulla has in TLM, The Muses are fine they just need ladies that can really belt out songs like the RENT soloists, and Phil will need a song that helps Hercules like Ill Make you a Man from Mulan"
Um...did you see the movie? Phil HAS a song that chronicles him helping Hercules, Meg HAS a song to belt out: "I Won't Say I'm in Love", and it's pretty obvious that they would add songs to the score to help flesh out Hercules (who, by the way, is a pretty well developed character already).
"A Stunning Set"
With Disney, that's usually the main objective.
Basically, all of these points you're making are rather basic. They're all true, but it's nothing different from any other Broadway show. Or at least, any good adaptation would need "more songs", a "good cast", a "good director", and a "good set".
"Sing the words, Patti!!!!" Stephen Sondheim to Patti LuPone.