>>1812005
I think the lore on Palpagos geography and ancient civ tech is still vague enough that cross-dimensional/temporal stuff could be thrown in to explain Terraria's inclusion and also open the door for other things.
If there is new lore I'd expect Terraria elements to be treated as an anomaly and not something deeply tied to things like faction politics/pal lore/calamity/etc.

Hypothetically, what would happen if you explicitly made crossover content a keystone of your worldbuilding and something happened to burn the bridge with that IP?