I was divided about the first poster for The Mist. There were things I liked but I felt that the execution was lacking. Altough this new poster drops some of the interesting aspects of the first, I think it is, overall, a more successful effort.
The greatest achievement of the poster is that it manages to successfully make the mist seem like a palpable, oppressive and likely dangerous thing. A mist isn’t exactly the most scary monster in the world, so it takes some effort to achieve that. I also like that the poster gives us a sense that the characters are somewhat trapped, which I believe is consistent with the film’s story.
And yes, the poster does add a child, which is a very cheap way of raising the stakes. But hey, it kind of works.