Monsters, Inc. 2: Sequel or Prequel?

According to the Dutch blog Animatie, Pixar's upcoming Monsters, Inc. 2 is set to be a prequel, not a sequel as most had been expecting. The film is said to take place when Mike and Sulley attended university, or more precisely, Monstropolis' University of Fear, and instead of being best friends, they were rivals. This idea sounds interesting, and I'm sure it would turn out great, but I was really hoping for an actual sequel to the original film. I wanted to see Sulley and Mike enter the human world and getting lost in there or something like that, but a prequel is a great idea as well. However, none of this has been confirmed by Pixar itself, so for the time being, these are just rumors and could have nothing to do with what is actually going to happen. Monsters, Inc. 2 (prequel or not) hits theaters on November 2, 2012 (exactly 11 years after the original film made its debut in cinemas).

So what do you prefer? Sequel or prequel?