Celestia and Luna are very important, I think they should not be underestimated or worse forgotten. We know nothing about their past, so I would like a film about the two sisters to be made, explaining their origins, their sisterhood relationship, who their parents were, their studies with Star Swirl, their transformation into an alicorn and their coronation, their dispute with King Sombra and Discord, up to the reasons that led Luna to turn into Nightmare Moon. 
I ask you to sign, if you also want to discover their past, and deepen their characters. Thank you!