Hm, I might just let thier murder slide, however, I can't help but feel keeping them alive will allow their writers to pull some nice "connection from the past" storylines (like the King of Tears) which might or might not work as well with their children.
Also, so far, every flashback into the 40s and 50s in Starman and JSA (New Frontier, too) has been a real treat, storywise. These times make for so much better settings... So I wanna at least keep Sentinel, old man Flash and Wildcat around for some time.
