Board Thread:The Flash discussions/@comment-9346948-20170510001536/@comment-3423279-20170518142814

Uriel Exor wrote: @Stryzzar Not if it was anyone from the future; they'd essentially screw the timeline. But that never happened due to absence of Time Wraiths and Black Flash. Time Wraiths didn't feel the need to appear when Eobard altered the past or when Barry majorly messed with the timeline and made Flashpoint.

Citing that they'd screw the timeline as a reason for why it couldn't happen means you're watching a different show than me, where Time Remnants are literally living paradoxes and Eobard was able to exist in a past where he was never born in the future.

Screwing the timeline is what Barry does with as much ease as we do eating breakfast