AAHH I LOVE YOUR LATEST ARTBOF THE TTS AU FEATURING ELSA AND ANNA!! Everyone's coronation outfits are stunning, especially Jack's suit! Love Cass staying on brand and ruining other people's parties lol. Anna bashing a sentient cake with a pitchfork while bemoaning how much she wanted to eat it is totally something she'd do. And what's this I hear about Jack and Elsa taking a trip to Ahtohallan together? What sort of things do they discover there? More moon stone lore?

What I came up with is the answer to the question: how does Jack find out he has the future Moonstone? I already established that he gets some funky visions in the House of Yesterday's Tomorrow that hint at that.

So Jack starts having this big doubt, but he doesn't know what to do with it until he meets Elsa, who is a spirit. (Tangent: in this specific time there are no Guardians yet which I know doesn't make a lot of sense timeline-wise but I want to pretend Tangled happened before them so it's easier for me)

Luckily Elsa knows the perfect place to get some answers about Jack's past and the two go to Ahtohallan. (Perfect moment for a song AND a line from Jack about how Elsa doesn't need to worry about him freezing since, well, he already died once)

(Also his suit gets messed up in the cake fight and that's my excuse for giving him pretty clothes made by Elsa. Because I have 0 self control)