Several outlets are reporting that Pixar has revealed Dan Scanlon as the director of Monsters University. The confirmation came during this week's Cars 2 bloggers' event at Pixar, which I unfortunately wasn't able to attend.
Scanlon (@MrDanScanlon on Twitter) is a former Disney
and DreamWorks animator. Having joined Pixar in the mid-2000s, he did storyboards and provided screenplay material for Cars and co-directed the feature-based short Mater and the Ghostlight.