Rose and Bad Wolf?

In 'Silence in the Library' these pictures were on the wall as the girl's drawings. Do you think it looks like Rose and Bad Wolf? Is this another sign of her return? Also, if you look carefully, it seems there is an outline of a Dalek in the background... Could this be a hint for their return?

What do you think? Say below!

Credit to DoctorWhoMadOnline for the pictures!