Belief is far too strong a word, just a few parallels and things that expand beyond Faerun. A few examples:
Gale hosting a piece of astral plane The Mindflayers ability to construct new Nautiloids. The very strange party composition reminiscent of the population of Sigil. The concentration of such strange characters in Faerun is far lower.
A few more notes:
The visions suggest that the tadpole is angry at the absolute for putting it in stasis and using it Someone said that one of the visions glitched for him and he could see raphael. Unconfirmed the game logo shows a mindflayer with horns. Could Raphael be in a contract with some mindflayers to build an army?
why dose it have to be a new one? What if it was frozen/lost in time and just reemerged and was instantly attacket?
It really doesn't have to be a new one, but
the Githyanki were not after the ship. They were chasing after Shadowheart and the artifact in her inventory.
How she ended up on it is the real question. She got a magically warded pod, unlike the others on the ship. As if she was special cargo.
I just realized that nobody mention the Absolute's symbol is a bloody hand.