Talk:The Last Problem/@comment-28905659-20191019172538/@comment-44073254-20191019210155

That's left open to interpretation. I think that Twilight is grooming Luster to succeed her so that Luster can take control of Equestria, then Twilight can give up her immortality (which I believe Celestia and Luna did when they performed that crown altering spell). Luster becomes new Princess of Friendship. You can make your own happy ending, check out my fanfic Passing On Together on Fimfiction. Its not done yet but hopefully will be in a couple weeks.