I just watched Rarity Takes Manehattan a few days ago, and I wanted to share some thoughts.
Like a lot of people or ponies, I think that rainbow thread is Rarity's key. It also hints that the next pony to get her key is Rainbow. It seems like every other episode, a key is found.
Rarity Takes Manehattan--Rarity got her key
Pinkie Apple Pie--the 'inbetween episode'
Rainbow Falls--Rainbow has to choose between Ponyville and Cloudsdale, which will show loyalty (most likely to Ponyville). She will probably get something pink as a reward, hinting that Pinkie is next.
Three's A Crowd--another 'inbetween episode'
Pinkie Pride--Pinkie needs to be the best partier, so she has to get everypony to laugh, showing the element of laughter. She will get her ke…Read more >