Mojang might be adding a new item called the quiver which holds arrows for your bow, for the proof that this might bee added, if you go into the minecraft pocket edition system files you will find that there is a strange new picture that is an item. They will also be adding creepers aswell as skeletons and spiders, but this game might only be able to play on the iphone 4 because of all the memory it will use if the creeper blows up!