User blog comment:LovelyLevy17/What happened to Future Levy?/@comment-26389992-20170113172525/@comment-1776824-20170114071444

Misk is completely correct, and Hiro has come up with a legitimate way to explain why that time line exists. As you can see here, Hiro posits multiverse theory for his story. However, he also seemingly contradicts himself in the fact that it was explicitly stated that once Eclipse was destroyed, everyone should have had their memories wiped and all damages should have been reversed, but it didn't. In the Star Memory chapter, it is explained that two Eclipse Gates have to be used (the exact same one to be opened as an exit once someone has been sent through), and if they aren't, it creates temporal anomalies. Because the Eclipse Gate was used improperly, it created a warped series of timelines that all converged at one point. Once the specific Eclipse Gate that was used to send all those involved into July of X791 was destroyed, it sent everyone back to their original timelines, not erased the timelines. Again, it doesn't change what happened to their futures, it just created a paradox where they couldn't have possibly traveled to that point in time if it was destroyed in the past. But because, like I also said, only one Eclipse Gate was used instead of two for all those situations, in Lucy and Rogue's times, the damage from opening a single Eclipse Gate continued to exist, meaning their own futures still sadly exist, but as permanently disconnected time periods that continue to play out.