Thanks to the people of TVShowsOnDVD.com (and to the notice by Steve from the Futurama Fan Forum), we can now read the Official Press Release of the Futurama Movie number 2: The Beast with a Billion Backs, so there you go the Synopsis and the DVD Special Features:

Synopsis:

In Futurama's latest and most tentacle-packed epic, space itself rips open, revealing a gateway to another universe. But what lies beyond? Horror? Love? Or maybe both, if it happens to contain a repulsive, planet-sized monster with romantic intentions! Nothing less than the fate of human and robot-kind is at stake as the Futurama crew takes on The Beast With A Billion Backs.

DVD Special Features:

• Commentary By Matt Groening, David X. Cohen, Billy West, John DiMaggio, Maurice LaMarche, Michael Rowe, Claudia Katz, Peter Avanzino and Lee Supercinski
• Futurama The Lost Adventure - A Long-Lost, Full-Length Adventure Produced for the Futurama Video Game
• Audio Commentary By Matt Groening, David X. Cohen, Billy West, John DiMaggio, Maurice LaMarche, Michael Rowe, J. Stewart Burns and Lee Supercinski
• Meet Yivo! Featurette with David Cross
• A Brief History Of Deathball Featurette
• Blooperama: The Futurama Cast At 'Work'
• 3D Models With Animator Discussion
• Storyboard Animatic: The Beast With A Billion Backs, Part One
• Deleted Scenes/Storyboards
  • Original Opening
  • Fry and Colleen Meeting
  • St. Asimov Parade
  • Zapp and Scientists
  • Amy, Fry and Leela
  • Scruffy, the Janitor
• Futurama: Bender's Game - A Sneak Peek at the Next Futurama Epic!

Also, the release date was confirmed, June 24, 2008. For more info of the Official Press Release visit the original article. You can also read the whole Official Press Release in the Futurama Returns! News.