The alien through the eyes is pretty generic, woman screaming is generic. I like the idea of the alien egg in the woods with the predator mark on it (if the eggs are even going to be in the woods) and the city on top/sewer on bottom idea.
Don't dream too hard though, we're most likely going to get an extreme close-up of the creatures faces or something (ex. AvP) which could also work real well if done right.