Director Guillermo del Toro is currently in post-production on his creature feature Pacific Rim, which is set to hit theaters July 12, 2013. It was believed that the H.P. Lovecraft adaptation At the Mountains of Madness would be his next directorial effort, but now the director reveals this project isn't happening due to the striking similarities between it and Fox's highly-anticipated sci-fi thriller Prometheus from director Ridley Scott.

"I have been interviewed about this lately and wanted to post my two cents about this: RELATED: Guillermo Del Toro Will Fight to His Grave to Get At the Mountains of Madness Made

Prometheus started filming a while ago - right at the time we were in preproduction on Pacific Rim. The title itself gave me pause - knowing that Alien was heavily influenced by Lovecraft and his novella.

This time, decades later with the budget and place Ridley Scott occupied, I assumed the greek metaphor alluded at the creation aspects of the HPL book. I believe I am right and if so, as a fan, I am delighted to see a new RS science fiction film, but this will probably mark a long pause - if not the demise - of ATMOM.

The sad part is - I have been pursuing ATMOM for over a decade now - and, well, after Hellboy II, two projects I dearly loved were not brought to fruition for me.

The good part is: One project did... And I am loving it and grateful for the blessings I have received."

He also responded to fans who replied to his thread, wondering what the connection between At the Mountains of Madness and Prometheus is.

"Same premise. Scenes that would be almost identical. Both movies seem to share identical set pieces and the exact same BIG REVELATION (twist) at the end. I won't spoil it."