"[Mike and Sully] end up in the same fraternity where they have this scare competition - like Greek Games in college. They have to mobilize a group, sort of like Revenge of the Nerds-monsters, and get them ready to be scary."
The actor also added that these characters are still at an awkward stage in their lives when they enter the university.
"They're 17 and 18 years old in the script. My guy has a retainer, even."
You can to watch the four teaser trailers that debuted back in June.
Monsters University was released June 21st, 2013 and stars Billy Crystal, John Goodman, Steve Buscemi, Helen Mirren, Peter Sohn, Joel Murray, Sean Hayes, Dave Foley. The film is directed by Dan Scanlon.