Monsters Vs. Aliens 2

Monsters Vs. Aliens 2 was the planned sequel to DreamWorks's 2009 animated movie Monsters Vs. Aliens.

Plot
The plot is currently unknown.

Why It Was Cancelled

 * The first movie, while it received positive reviews, did not do well enough at the box office internationally (most notably in France and Japan) to earn a sequel.
 * DreamWorks does not have any plans to produce any future movie-genre parodies like Shark Tale, Monsters vs. Aliens (the previous film) and Megamind after former CEO of DreamWorks Animation Jeffrey Katzenberg stated that those films did not do well internationally, given how typical movie-genre parody flicks are now having a decline in popularity.
 * The Nickelodeon show was a failure.

Result

 * The sequel was permanently cancelled.
 * Monsters Vs. Aliens is a standalone film.