Moonstuck/WMG

Woona is actually a full grown Luna inside a Lotus Eater Machine
Knowing that Luna would be trapped in the moon for a long time, Celestia cast a spell that would cause Luna to see her imprisonment as a fun adventure instead of maddening isolation. The Nightmare Woon is actually Luna subconsciously struggling against her own darker half.
 * Considering this, the Eclipse during the confrontation (with Celestia watching) and baby blanket would take on great meaning.
 * The broken note may indicate that Celestia has some knowledge of what is going on inside the adventure, or possibly even control of it to some extent.
 * The queens of the Lunar Maria and the Bat Ponies represent Celestia: graceful, kind, loving rulers who help guide Luna on her quest and comfort her when she feels homesick. Also note that the former is a unicorn while the latter is a pegasus, which both match Celestia's description.

The Three Lunar Stones are actually three of the Elements of Harmony
Specifically, they are the three stones that Luna represented before she went Nightmare Moon.