Yes, it is a possibility, When the time comes, Rainbow Dash will probably become a Wonderbolt and will achieve her dreams, so will the CMC and the other 5 ponies, I can possibly see Twilight Sparkle becoming an alicorn at some point, and the CMC' getting their cutie marks, Fluttershy could run a vets? Applejack could renovate Sweet Apple Acres and fix Granny Smith's hip, Rarity will probably become a huge fashion designer and Pinkie Pie will take over Sugar Cube Corner when the time comes.