'Monsters, Inc. 2' (or 'Monsters University' as it's officially titled) is coming next summer for Disney-Pixar and if you're looking forward to the return of Mike and Sulley, we've got the first trailer for you today! Wait, what's that? We have four new trailers for you today? Yes, we do!

That's right, Disney has premiered four 'Monsters University' trailers this morning, all of which are immensely entertaining. So why cut four trailers at one time for 'Monsters, Inc. 2?'

Director Dan Scanlon (who previously directed one of the 'Cars' shorts) explains, "Billy Crystal's an amazing comedic actor. He gave us so much fun material, we decided to cut four slightly different versions of the trailer. We are so happy to have him back as Mike!"

Uhh, you too John Goodman!

Mike Wazowski and James P. Sullivan are an inseparable pair, but that wasn't always the case. From the moment these two mismatched monsters met they couldn't stand each other. 'Monsters University' unlocks the door to how Mike and Sulley overcame their differences and became the best of friends.

Watch all four 'Monsters University' / 'Monsters Inc. 2' trailers below! And after you watch them, click here for five fun things Pixar has hidden in the trailer!