Actually, this isn't bad at all. I think at least elements of it could be true.
My only problem is if the tenth doctor regenerates there, wouldn't that mean the End of Time and a lot of Tenth Doctor adventures never happen? Is that the BBCs way of getting rid of the EN of Time?
I love the whole alternate ninth and omega thing, but I don't like that it could change establishes who history.
But it looks like I'll have to take this ith a pinch of salt. Still, good story.