The spaceship is NOT a retcon. The twins falling from the sky like two shooting stars is ALSO NOT a retcon. Everyone in this story is an unreliable narrator.

*“O Almighty Sovereign, the Universitas Magistrorum has provided the predictions you requested: The two stars have been captured by the world’s gravity… After a lengthy orbital period, today their paths shall intertwine once more.”*

Because WHAT DO YOU MEAN TWO STARS?

If they were talking about BOTH OF THEM TOGETHER inside the SAME SPACESHIP, then WHY THE HECK is there an ORBITAL PERIOD where their PATHS need to CROSS? If they were already together, their paths wouldn’t need to “intertwine once more.”

And this is PRE-CATACLYSM, BEFORE the Abyss sibling was taken by Khaenri’ah.

*“The heavens responded to the summoning.”*

WHY THE HECK IS THE “HEAVENS” RESPONDING TO A SUMMONING? HP WAS FULLY AWAKE AT THAT TIME BTW

Let’s assume Khaenri’ah had access to the TRUE SKY, considering Dainsleif and Vedrfolnir loved stargazing together. But the prediction came from the Universitas Magistrorum, NOT Vedrfolnir, who sits in a higher court.

And how do predictions usually work in Genshin? ASTROLOGY.

So it makes WAY more sense that they drew this prediction from ACTUAL STARS. Because if they were reading the FAKE SKY made by the HEAVENLY PRINCIPLES, that would be WAY MORE DUCKED UP.

AND WHY THE HELL DOES THE ABYSS SIBLING LOSE THEIR MEMORY WHEN SUMMONED INTO KHAENRI’AH?

LOSS OF MEMORY = DEATH BTW

So HOW THE HECK did the Abyss sibling “DIE” when they were SUPPOSED to be HIBERNATING IN THE SAME SPACESHIP AS THE TRAVELER?

AND AGAIN, WHY IS THE “HEAVENS” RESPONDING, WHEN THEIR SPACESHIP WAS LITERALLY LYING ON THE GROUND FOR 500+ YEARS? NOT THE HEAVENS

Unless... let's assume they were SNATCHED MID FALL ofc

BUT EVEN THEN, HOW DID THEY DIE? WHY WOULD THE “HEAVENS RESPONDING” WOULD BE THEM BEING TELEPORTED TO A DIFFERENT NATION DURING MID-FALL?

None of this lines up. Hence, everyone is just unreliable and hiding something.
Twins lore isn't retcon, it is unreliable narration