A sudden fic idea

 A sudden au fic thought tonight: Suppose Halbrand was Celebrian's father. Suppose when Celebrian was attacked by orcs she was unexpectedly darkly empowered to rule them instead. Suppose Elrond was not a single father. Suppose Elladan, Elrohir, and Arwen were inherently forbidden the option of going West... (IDEK what Celeborn would do with all this.)