It's the Great Pumpkin, Michael Myers
This poster is being passed off as the "Official One-Sheet" for Rob Zombie's "H2", but word from STYD is that this is just one of dozens of contenders for the final poster. This is apparently the way studios normally work, commissioning a design company to come up with lots of options.
If they do pick this one, they're out of their minds, because it barely looks like it was done by a professional. Unless they were trying to channel "It's the Great Pumpkin, Charlie Brown". In which case... bravo?