In a possible future where members of the current incarnation of the Teen Titans mature into a corrupt and tyrannical Justice League, the Cosmic Treadmill is absent from the Flash Museum; it is instead kept in a more secure location inside the Batcave, presumably to ensure that their "enemies"—in truth, a group of right-minded Titans—cannot alter the past and change their timeline.
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In its last appearance before the Crisis on Infinite Earths, Barry used it to relocate to the 30th Century to be reunited with his wife, Iris West.
Cosmic Gate | Cosmic Boy | Cosmic Wheels | Cosmic Slop | Cosmic Rough Riders | cosmic string | Cosmic Wheels (album) | Cosmic Universal Fashion | Cosmic Treadmill | Cosmic Thing | Cosmic dust | Cosmic Award | Vultress (Cosmic Nomads album) | The Zodiac: Cosmic Sounds | Omnidirectional treadmill | Millennium (Cosmic Nomads album) | Institute for Cosmic Ray Research | High Resolution Fly's Eye Cosmic Ray Detector | Health threat from cosmic rays | Garden of Cosmic Speculation | Cosmic View | Cosmic Slop (song) | Cosmic Background Explorer |
In Justice League: Cry for Justice #2 (2009), while volunteering as night guards at Flash Museum, they were killed by an unknown assailant who steals the Cosmic Treadmill.