We have learned quite a lot from issue #10, not least about Fluttershy, who is now confirmed dead, and that means that everyone from the G4 generation has also passed away with a single exception, Discord who can appear in MYM/TYT as an old and tired draconequus which is no longer as strong as before. The way this is presented is interesting in itself; she manifested as a spirit when she comforted Discord and it could be seen that she exists in the world of mortals as a glowing pink-yellow butterfly. We have seen in the cover of #10 that her cutie marks were around Discord even in what was thought to be a memorial or mausoleum - instead this could be a glimpse of the Elysium or the heaven for the ponies. Where all of the Mane 6 have their cutie marks.
This then produces a hypothesis; What if the cutie marks are not only about the life, but also about the afterlife? We don’t know much about how the ponies got their names, only that the parents gave their foals names out of impulsiveness - yet it has been seen that these names were a good fit for the ponies’ future lives and careers. It is possible that cutie marks also dictate the fate of the pony. We have not received an answer about how the Sun and Moon move around Equus in G5, but it is speculated that this may be in connection with Celestia and Luna. And from C3 we discovered a mysterious star of a magical nature that traveled around the sky something like a shooting star and stopped once (maybe twice?) a year. A postcard in MYM revealed Twilight’s cutie mark as a shooting star.
If this hypothesis has any merit, it is possible that the fate of the immortal alicorns was already decided by their cutie marks. Then it means that Cadence will merge with the Crystal Heart, that Celestia and Luna will become one with the celestial bodies and that Twilight will become a star. It may be their last ascension from the world of mortals. But it is also seen that the cutie marks is about life for the ponies, it was predetermined that Twilight will meet her five close friends. And since these five “stars” do not appear, it is believed that she is not completely dead, perhaps because she is waiting.
So if the Sunny Starscout is destined to find Twilight, that also means she will ascend many centuries later to become a shooting star, when her “death” comes. Hmm… so when Twilight “died” after meeting Sunny, will the star disappear - or will the five smaller stars join the Wishing Star? Then they have been reunited forever.
Opaline’s cutie mark had predicted that she would become an alicorn, but did it predict her destiny? Anyone who plays with fire risks being consumed by the fire.
If Fluttershy can return to the world of mortals, so can the other heroines and heroes among the ponies of G4. They will undoubtedly follow what happens with the Mane 5, and cannot be observed unless their cutie marks are discovered. This gives an opportunity for Argyle to return one day in the G5.
And then it meant that all generations of My Little Pony since the beginning will never be gone. The magic is timeless. The cutie marks can be the very essence of the Ponykind in the past, present and future.