~~~~~~~~~~~~~~ WINBORN SPOILERS IF YOU HAVN"T READ IT DON"T READ ANYMORE OF THIS POST UNLESS YOU WANT TO BE SPOILED~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Here we go:
I know some of you think Riversun will grow up to be a villain, while some think she will be good, and others undecided. I personally think she will grow up, realize her parents' mistakes, and join Star's herd. If she even lives.
Riversun was still nursing when Petalcloud was smashed by the tribute. I think she still had another moon or so til she could be safely weaned. But please correct me if I'm wrong. Stormtail took her with the Ice Warriors to raise her, but she didn't have the starfire, so she's not immortal, and needs milk. Unless there is a mare that takes her in, it's very likely that she could have died. But her not being immortal yet brings me to another theory.
Was there a Hundred Year Star in the sky when she was born? Because there have only been two black foals who lived long enough to receive the starfire, and Nightwing is the only black foal to have a foal himself, there is no information on whether or not the starfire is inherited. It could be that when a black foal has their own foal, the foal inherits the rare black coat, and not the starfire.
Last year in my science class, we were studying genetics, and I began to be very interested in horse coat color genes. The black coat on pegasi could be like gray in real life, where the gene is ALWAYS dominant, and no matter what gene one of the parents has, if there is a gray gene, the foal is always a gray. And if the foal isn't gray, then the gene is gone from that family line forever. It could be the same with blacks.
Maybe slowly over time, black gradually becomes a more common color, because it is a dominant gene. Not as common as like bay, or chestnut, and maybe it depends on the herd, but in the future, maybe.
And there we go! I think that Riversun may have died (sad, but likely), and she may not even have the starfire, and black coats may not always mean starfire
So, what do think of my theories?
If any of my facts are wrong, or if my explanations didn't make sense, please tell me!