Another interesting scene from the Canadian trailer is Amy on a rooftop as the Doctor dashes towards her yelling What the hell are you doing. Her reply is a calm and determined Changing the picture. Series Fives The Time Of Angels established a new element of the Angels mythos: the image of an Angel becomes itself an Angel. So from that, heres what I think: Vastly outnumbered and seemingly without hope, Amy will repaint a billboard to depict a Weeping Angel in the hopes that it will come to life and either be on her side, or fight the other Angels for its own purpose.