>>280258289 (OP)Picrel requires reading the original sources to understand anything beyond the immediate plot.
This includes Herman Hesse's Demian, the original Swan Lake & Nutcracker plays, Coppélia, the Prokofiev version of Romeo & Juliet, and a general understanding of history of Theatre & Ballet as a whole.
There's also quite a lot of Gnostic subtext & Pagan myth elements that are not immediately obvious and are probably caused by Wagnerian influences, which are also present.