| Rex is killed by the Reverse-Flash | After a successful mission, Rex returned to the JSA headquarters with the but was attacked by the , who phased his vibrating hand through Rex's chest to prevent him from completing his warning to the Legends |
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| The speedster then fled, and the fatally injured Rex was discovered by Amaya | Unfortunately, both Vixen and were captured |
While the Legends were skeptical to believe him, Rex tried to stress the grave consequences of traveling through time again, but suddenly faded out of existence much to the Legends' confusion.
| He was then contacted by the president for a mission in Paris after Baron Kreiger was located | Rex is killed by the Reverse-Flash |
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| After confirming his whereabouts, he introduced himself and warned the group not to disembark on the ship, or they'd all die, and revealed to a skeptical Mick that he was sent by his own future-self | After a successful mission, Rex returned to the JSA headquarters with the but was attacked by the , who phased his vibrating hand through Rex's chest to prevent him from completing his warning to the Legends |
The Reverse-Flash attempted to stop Hourman and succeeded in killing the Legends but Hourman was successfully able to venture through time.
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