I don’t know much about Monsters Vs. Aliens, but from what I can tell from the posters it will be filled with strange creatures. Which are probably monsters and aliens. I have no idea which is which though.
Also, this blue blob (called bob) will be one of the main characters, after all it’s the only who appears in more than one poster version. Peculiar choice for protagonist, but hey, could work!
More disappointing is the fact that the posters show exactly zero cool fights between monsters and aliens. Hopefully the actual film will deliver on that front.