The Cosmic Generator is an item from Marvel Comics which is the central MacGuffin of the attraction Guardians of the Galaxy: Cosmic Rewind.
The Cosmic Generator is an orb-like engine which is able to create jump-points in the fabric of space, allowing for accelerated travel for ships through the cosmos. The generator appeared to contain lights resembling a galaxy within it, and could be manipulated by higher-beings like Celestials for time-travel.
The Cosmic Generator was technology from the planet Xandar, used by the Nova Corps. Around 2014 Cosmic Generator was equipped to a Nova Ship under the command of Centurion Tal Marik with the task of transporting Terran visitors of the Xandarian Outpost in EPCOT on Earth to Xandar as a show of diplomacy. This mission was interrupted by the Celestial Eson the Searcher who stole the Cosmic Generator to travel back in time and rewrite history.
Guardians of the Galaxy: Cosmic Rewind
The generator is the central MacGuffin of this attraction. It appears in the pre-show and is chased after in the ride.