How ‘Overlord’ stacks up against other funky movie mashups
(New York Post Movies)

It’s the surest way to increase box office this side of a 3-D up-charge. Take two film genres and smash them together, hopefully drawing twice the audience. `Overlord` looks to attract fans of WWII flicks and zombie features. Here, are some of the best and worst of past movie mashups. BEST `Shaun of the Dead`...