The Most Awesome Thing That Could Ever Happen in Doctor Who History

So, it's a known fact that Doctor Who, along with all other fiction, is 100% true in a parallel universe. But, what if certain elements of the plot line are still true in this universe? Specifically, I'm hoping for the part where the 10th Doctor runs the torch into the Olympic Games. I'm not sure if it's possible for a modified version of fiction to be true in this universe, but it still might be possible for that scene to happen. I'm hoping it will.

What if Jenna-Louise is going to play Amy's next regeneration?

So, what if Amy is actually the Doctor's and Romana's daughter? Maybe the Doctor got Romana pregnant, and she ran off to Earth before the Time Lock engaged. Romana then used the chameleon arch in her TARDIS to turn herself into a human. The chameleon arch had no effect on the unborn baby, allowing Amy to have regenerative capabilities. This could explain Amy's memory abilities and River Song's Time Lady traits. Also, the reason no one ever noticed this is because Amy has always had perfect health, so she was never taken in to a doctor's office.