This is not exactly the poster one would expect from a vampire movie. Especially not after the first, much more genre standard, poster. But it does make sense once you take into account that the film takes place in the near future and that an important plot point is that vampires are now harvesting humans in blood farms. Which I guess is what is being depicted in here.
Considering the glut of vampire themed movies, tv series and books I imagine this was an attempt to differentiate Daybreakers by focusing more on it’s sci-fi elements. Understandable, and the image itself is pretty great.
However, it is a little hard to tell what is happening here if you didn’t already know the movie’s story. And there is a danger that comes with leaving the whole vampire theme so in the background. Danger of seeming simply like a sci-fi movie, and not as a vampire movie with sci-fi elements.
And yes, this is perhaps a little too reminiscent of the Matrix movie and their human harvesting installations.
So, yeah, I’m not sure how successful the effort was. But I appreciate what they tried to do, and the human harvest is probably the most striking element of the movie’s concept, so I’m not sure they could have done much better.