Mashups are a fun way to make posters more entertaining, especially movie posters mashups. Mashing up geeky things, generally mixing stuff from geek and pop culture is somewhat of a pass time for many people, causing many nerdgasms when they make it just right.
Check out the 10 most fun movie poster mashups out there.
Underworld: Rise of the Lycans & Rango
Final Destination & Pirates of the Caribbean
Sex and the City & Alice in Wonderland
Rise of the Planet of the Apes & Avatar
Wall-E & Where the Wild Things Are
Smurfs & Fantastic Four
Batman & Smurfs
Terminator & Brokeback Mountain
Iron Man 3 & Get Him To The Greek
Kill Bill & Superbad