probably worked harder on this than I should have. I wanted to put a lot of small details into the poster to make it look aged and worn  
This is how it started X3 https://derpibooru.org/1775878
 
Whenever I think about how far the characters have come, one of the first things to jump into my mind is how Rainbow idolised these renowned stunt flyers and wanted to be a famous, respected flyer like them, always dreaming of joing that famous team, saying “One day! One day I’ll be a Wonderbolt!” and people scoffed… and then she proved them wrong, one step at a time.
 
so yeh just wanted to create a little thing illustrating her dream and its fulfilment.  
You go, Dashie! Light up the sky.