Create a crossover fanfiction taking two completely unrelated fictional universes and write about a grand adventure where the characters meet.
Crossovers are a staple within the world of fanfiction. In this prompt, you have the chance to explore how characters navigate the shocks and intricacies of an entirely new universe, along with the necessary adjustments in order to thrive or survive. What kind of relationships would form amidst these foreign circumstances? Conflicts? Alliances? Romances?