Here's the official synopsis, according to Amazon:
The year is 2125 and the Magellan Science Academy has given two lucky cadets “golden tickets” to join a team of space explorers on a special field trip to journey 24 hours into the future. But when their mission goes unexpectedly wrong, the two kids must band together with a miniature flying saucer sidekick to save themselves and their crew–and return to Space Mountain–before time runs out and the universe is destroyed!
Check out a collection of images from the book by Jones (thanks to Bleeding Cool).
We love Space Mountain, and we can only assume that this is the first stab at a new ride-centric franchise just like Pirates of the Caribbean and Guillermo del Toro's Haunted Mansion movie. And yes, the synopsis is fairly juvenile, but the graphic novel is being targeted at a much younger audience, so keep that in mind. Will Space Mountain take off like the rest of Disney ventures? Or will this sink like Atlantis?