This is what i would like to see and i know i won't. Celestia have a team of ponies move the remains Castle of the Pony Sisters to Ponyville then make it in the a plaza with the a Library, a Small castle and other buildings. They have many differint types of ponys that can help. so i think it could be done. Twilight is a Princess now.So in my mind she should live in a Castle with Guards. And they have a spare Castle. Then Twilight could take her time and read the books in the library of the Pony sisters. i feel it makes sense to have the answer in that old library or in the Crystle Empire Library.
and if you put Luna and Twilight in charge to the plaza project. Luna could teach Twilight little things about being a princess. Celestia is too Grand in twilights veiw but Luna is like a friend. (look at Luna Eclipsed) and we could get a good look at the Shadow Pony. and have a fight with luna getting hurt and have a dark magic infecting her. Twilight find in a book what the box is while looking for a way to help luna and the mane 6 went to find the keys and open the box to save luna and all of equestia from the Shadow Pony.
Tell me what you think.