'NO PEACE ON EARTH' could work for tag line if its done right, tho def not as a title. 'ALIENs(plural) vs PREDATOR' would work for me, like in the comics. Although the logo would have to be completely different from AVP:Alien vs Predator. Also i think the new alien life cycle is probably the ALIEN QUEEN facehugger/egg which has never really been seen before apart from Directors cut Alien3 ... heres hoping it is as the designs in alien 3 looked hot!