Hey, is Leticia again, well, I some weeks ago I just started to draw a comic of your au without knowing that Chara and Frisk where adults and just Asriel is dead when Chara is alive, and now I have 10 pages and nothing to do with this... WHAT I DOOOOO??? (And yes, I just started making a comic and a au in some days, I'm a f#ckin machine of content and creativity) (And yes, I don't asked to the creator before start making a comic, i'm stupid-)
I don't feel comfortable people using an AU i no longer work on as their own. With that said, maybe you can turn it into your own? It seems to be different enough to be its own thing n-n