I just had an evil plot bunny of drastic proportions.
Why it came from reading a fluff fic, I'll never know.
Maybe it had to do with unexpected complications.....? But there was something I read once where Time Lords/Gallifreyans of ages past could 'absorb', or do something similar, the best qualities of each species they encountered. So I wondered... assuming the Doctor came from one of those 'old' families, the potential to having that ability was still in his genes, just switched off. But what if he and Rose had a child, and that baby had that gene active, and killed Rose (!!!!!!!) slowly over a long period of time, only she and the Doctor didn't really know where it was coming from until it was too late? And then that baby, half-human and half-gallifreyan, didn't know how to control those abilities, and combined with the Vortex that he had absorbed from Rose (and in a way the TARDIS), aged too fast, and went somewhat insane, tripped through Time and Space, and became the Valeyard, leaving the Doctor with the knowledge of what he had created, with Rose so far near death there wasn't a guarantee she would recover?
.......Like I said, evil plot bunny. DO NOT EXPECT ME TO WRITE THIS THOUGH.
Maybe it had to do with unexpected complications.....? But there was something I read once where Time Lords/Gallifreyans of ages past could 'absorb', or do something similar, the best qualities of each species they encountered. So I wondered... assuming the Doctor came from one of those 'old' families, the potential to having that ability was still in his genes, just switched off. But what if he and Rose had a child, and that baby had that gene active, and killed Rose (!!!!!!!) slowly over a long period of time, only she and the Doctor didn't really know where it was coming from until it was too late? And then that baby, half-human and half-gallifreyan, didn't know how to control those abilities, and combined with the Vortex that he had absorbed from Rose (and in a way the TARDIS), aged too fast, and went somewhat insane, tripped through Time and Space, and became the Valeyard, leaving the Doctor with the knowledge of what he had created, with Rose so far near death there wasn't a guarantee she would recover?
.......Like I said, evil plot bunny. DO NOT EXPECT ME TO WRITE THIS THOUGH.