I do believe Cadence is Amore's daughter. Thinking of the life span of an alicorn, Amore is able to live for more than a thousand years. This being that it is a high possibility that they are mother and daughter. They also both have AMORE in their names. Yes, it could be that Celestia just liked the name Amore, or that she saw resemblance and named her in honor of the lost Princess, but it is more likely Celestia knew they were related. If you think back to the comics, I can remember Hope mentioning something about Cadence looking like Amore, then Cadence said she never met her parents and she was an orphan. Well if Amore was shattered 1,000 years ago would explain why she never met er mom. Her dad would not be alive 1,000 years in the future though. Unlike many others I don't see anything that could show Hope being Amore's descendant though. Yes I do believe that they should make more things with Sombra, where he and Hope return with a fully pieced together Princess Amore, but this happened in the comics. To the mlp characters the 'comic world' would be like an alternate universe. What happens in the comics doesn't happen in the episodes, what happens in the episodes is sometimes mentioned in the comics, but that doesn't make it the same. Because of this they will not make this happen, unless they start blending the episodes and comics...Though Sombra is my favorite character(don't judge me) I believe that I may have to start facing the facts that my favorite character has ended his quest to conquer Equestria. Or I might have to start facing the fact that my dear Sombra has lost his way across Equestria and is lost out in the cold winter, still going forth trying to complete his mission the acquire all the pieces of the once lost Princess.......Yet I shan't give up my hope that he will return in the future, with the newly constructed Princess......