Check out this trailer from the new JJ Abrams movie (creator of Lost and Alias) and come up with a visual what the monster could look like. You can take this in a variety of directions. It can be completely realistic or stylized, serious or funny.
Couple of things that were mentioned in the trailer that could help: -its huge -its alive -animalistic roar -strong enought to decapitate Lady Liberty
I had planned to have a very complicated scene here but as usual I was time challenged. Until 2 1/2 hours ago, this was a pencil drawing. I almost submitted it too but I felt guilty since everyone turned in color paintings. It was almost an X-rated painting too. I just didn't have the guts so repositioned the chick on the steps lower to make it more family friendly. Heh.