Board Thread:The Flash discussions/@comment-13895380-20170103171048/@comment-13895380-20170104002025

Stryzzar wrote: It's how Jay Garrick explained. When you break time and try to fix it, you can't restore it to exactly how it was. It's like fixing a broken mug, there will always be a crack remaining.

It's likely that since Eobard was aware of Flashpoint and had to go back and change the past, he knew about his fate at the end of season 1 and had it play out differently. I think the LoT Eobard didn't bother with the Harrison Wells stuff and went straight to teaming up with Darhk. But Barry would know about the changes, especially one so significant. If Eobard didn't lose his speed and didn't have to pretend to be Harrison Wells, he'd have no reason to accelerate the production of the Particle Accelerator and thus, a whole heap of changes would occur for Barry to notice. Heck, Barry might not have gotten struck by lightning that day and he wouldn't have met Caitlyn and Cisco. Even further, he might have gotten his powers later. There'd be no reason for Eddy to die. The portal to E2 wouldn't have happened. I think a whole season worth of changes and more would definitely be worth noting by Barry and he'd definitely notice it. All the changes Flashpoint made as stated in the show are minimal in comparison to this theory.

The only theory I could think of is similar to how younger Reverse Flash appeared in S2, via a time loop. He was like a remnant protected by the speed force, so that event had to happen even though he was technically erased from time. I feel like the speed force protects Legends' Reverse Flash's existence.

It'd be pretty cool if Reverse Flash wants the Spear of Destiny to change his, as he's racing against the erasing of his existence done in S1, but he can only do it for so long. :P But the leading theory is that he wants to use the Spear of Destiny to erase Barry from time without erasing himself -- his own identity.