Strike the pixie idea. Nothing else has come to mind, so you might as well dump it and be through.
In terms of the Sparrington '04, more plausible idea came to mind. Have Norrington and Sparrow piss off some obscure god (do the research later) and be cursed to carry the souls forward, reborn with memories locked away until they appease/solve something, etc.etc.
It would make the unlocking of the memories plausible as well as keeping them the same people while still keeping it in '04.
Verona Beach AU. Re-rent Romeo and Juliet to get reacquainted, most likely some bloody type of murderish type setting. Possible to do the Dom/Orlando here, with Billy as an angelic sort of presence, not in that he's holy and good but that he is always watching over. Possible costume party, give Billy the wings the Juliet wears.
Ficlet in which being called a 'movie star' is still something new and disturbing to Billy.
Firefly idea. Go back to Zoe and Wash's wedding. Write about it. Kind of a line going through my head:
The wedding was planned by Mal (against Wash's greater arguments), and in the end, it turned out to be like every other social event Mal planned and hosted. There were guns, there was blood, and a great deal of people who weren't happy with the guests of honour.
The blood had even gotten into the cake.
Jayne had wanted that cake.
Billijah. Elijah is jealous of the way Billy seems to defy age.