I didn't think about the Time Trapper. The previous one was revealed to be none other than a timey wimey Superboy Prime in the Crisis of Three Worlds trade. That makes sense if this is a new one.
Also I find it curious that another character has a hard time letting go of a family member and catastrophic changes are made because of it. This reminded me of Spider-Man's deal with the devil over Aunt May's life as a way to force apart the marriage of Mary Jane and Peter in Marvel. DC uses Barry Allen's mom as a plot device to create a new continuity.