I think that in S6or7 Twilight sparkle should no longer be the main character in mlp she has done what she was intended to do wich was becoming a alacorn. Who should replace her you ask in my opinion it should be Sunset Shimmer. Doing this would result in more popularity for the show. OR they can scrap mlp as it is right now and do a mlp EG series to take it's place. it would take a alacorn born to shining armor and cadence to boost popularly oops ....um....spoiler?