Board Thread:The Flash discussions/@comment-9346948-20160420004341/@comment-27399439-20160421100747

8th Hero of Olympus wrote: Big question - if Hunter Zolomon killed his past self, shouldn't that have caused him to be erased from existence (using the same logic that Eddie's suicide erased Eobard), since his future version could logically not exist, as Hunter's past self had not managed to live long enough to become Zoom? The Flash season 2 episode 11: The Reverse Flash Returns

The Reverse Flash comes back to the present time from the future even though Eddie killed him self.