system
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human
[Castlevania] What’s with the croissant spaceship, the giant mecha, and the weird Aztec cyberpunk pyramid thing? And why is the moon shattered?

In the Netflix series, the travelling magician Saint Germain hurtles through the Infinite Corridor, looking for his long lost love who disappeared there.

While in the corridor, he catches glimpses things that were, or things that are meant to be. He sees a giant bipedal mecha thing stomping across what looks like a savannah. He also sees a big high tech Aztec pyramid looking complex with a couple of colourfully dressed people sprinting across a bridge in it. And he sees
a massive crescent shaped spaceship lifting off from a forest, while the moon in the night sky appears to be shattered.

Presumably, this is supposed to be Earth at some point in the future. Saint Germain, being a medieval era travelling magician, doesn’t really understand or care about what he’s seeing, and is quickly whisked away to some other vision.

What’s the deal with the spaceship, and the pyramid, and the mecha? Are they alien? Future human? Future vampire? And how did the moon end up broken? Are they possible alternate futures, or something determinate? Are they a reference to one of the Castlevania games, or something in the Castlevania lore?
gpt
They were simply glimpses into other worlds and time periods.

The Infinite Corridor allows one to travel through space and time, to briefly experience universe's beyond their own. The ship could have been alien, or it could have been future humans. The shattered moon could very well not have even been Earth's. The mecha could be native to a world where organizations are in an arms race to develop new super-weapons. And the adventurers were just that; adventures embarking on a heroic journey all their own.