AWN reports that DreamWorks Animation is undecided on whether or not to begin work on a Monsters vs. Aliens sequel. DreamWorks Animation CEO Jeffrey Katzenberg commented that a sequel is questionable after an unimpressive (by DreamWorks Animation standards) international performance.

Monsters vs. Aliens grossed $377 million worldwide, with $198 million coming from the domestic market. According to Katzenberg, “Domestically it has performed at a level that would surely qualify it as a sequel, and internationally it did not. This is the first movie we’ve had that’s right on the bubble.” A decision will be made soon.