User blog comment:Darkcloud1111/Official "The Sea of Monsters (movie)" Discussion/@comment-5850470-20130807202900/@comment-1515612-20130807230327

I don't understand why you would need to explain someone changing their hair like it's so magical to dye your hair in this age. So no, they didn't.

The Great Prophecy is used to act like it is the Prophecy in SoM, but it's not or it's not "fulfilled" at the end. Prophecy was changed to 20, implied that Riptide is the cursed blade.