Much like the rest of the internet right now, I see giant monsters every time I close my eyes. This one isn't from any particular movie, though I admit it does bear a general resemblance to the creatures in Pacific Rim.
Speaking of which, are you Guillermo del Toro? If you are, here is my idea for Pacific Rim 2:
More giant monsters fighting people inside giant robots, but also more than one female character who talks. And fewer dudes fighting over a woman's honor. And fewer women almost accidentally killing everyone because they can't control their emotions. I liked your movie, but come on.