I am rather unenthused about this, if it does indeed turn out to be truth and not scuttlebutt. I liked the character of Rose well enough whilst she was there, but as you say, I can't see this arc going anywhere.

Also, even if they do head off and have 2.4 timebabies, I could so do without the Doctor coming back at the beginning of season five with a bad case of 'Woe, Rose has just died of natural causes at the age of two hundred and seven... and I'm going to hang around in 2000s London anyway'