
As you can see the skin is burnt off from the carpet bombing explosions at the end of the past movie. Due to visibility issues J.J. decided to change the monsters appearance. I myself believe that the whole point of the movie is to not see the monster clearly. It is most probable that adaptions will be made to the monster's appearance because I think it looks too different. Most people are thinking that there will not be a next Cloverfield, that is wrong due to the fact that J.J. mentioned that making of this sequel many times.