Hey everyone,
I came up with a new BillDip headcannon-
So, basically, Bill and Dipper's souls each travel to different worlds/AUs when they die, but in order to move to different AUs, Bill and Dipper must both be dead. If one is some type of supernatural being they can remember their past lives together, but sometimes both remember, or even sometimes they both forget, supernatural being or not.
I think this opens up areas for really sad stories, like if it was a romance between he two and one died, then they might have to watch the other grow as they wait for them to die. They could have other relationships, and they could even have kids!
Of course, they aren't always in a romance, sometimes it is merely platonic, sometimes it could be romantic, or in others they could even be enemies. But until they move on to the next world, they still think the same about the other as they did in the current AU. Another part of it would be that, even if they hated each others guts, they would feel like a piece of them was missing when one died.
I think this would best be suited to be a series of one-shots in different universes, but I'm not sure. I would love to have you guys' input on this!