While at a 20th anniversary screening of his 1991 comedy western, City Slickers, Billy Crystal talked about the upcoming follow-up, Monsters, Inc. 2, which is in fact a prequel.

The movie, which is more officially titled Monsters University, follows future best buddies Mike Wazowski (Crystal) and James Sullivan (John Goodman) when they were back in college working their way towards jobs at Monsters, Incorporated. At the time, the two aren’t friends but more like rivals before eventually forming the relationship we saw in the original.

As most of you are well-aware, Pixar Animation has been on something on a sequel kick lately with the release of Toy Story 3, Cars 2 set to hit this summer, and the planned sequel to their 2001 hit Monsters Inc., which we now know will come next summer in 2012.

The Walt Disney Company, while at the CinemaCon convention currently taking place in Las Vegas, confirmed the release year as well as something that had been rumored since the beginning of January: that Monsters Inc. 2 would actually be a prequel (Read: Rumor For Your Thoughts: Will “˜Monsters Inc. 2″² Be A Prequel?).

News has been pretty slow over the holidays, and while we wait for things to begin picking up again, there’s always those ever-so-fun rumors to ponder.

Today there’s a rumor regarding another expected sequel in the magical world of Pixar Animation. As many of you know, Pixar was never big on any type of sequels not counting their Toy Story franchise. But with Toy Story 3 released this past summer and Cars 2 set for this upcoming summer, the popular studio is clearly taking time to expand upon some of their fantastic existing worlds instead of delivering more original content.

Other expected sequels from Pixar are Monsters Inc. 2 and The Incredibles (which seemed like the most likely to get a second film from the start), but it’s the former that’s on the rumor menu on this day.