Young Justice was not all that effective of a show with all their young people. They ruined Wally much like at the end of the DCU. A lot of characters got short-changed because there were so many characters and subplots going around at the same time. Wally West was the slowest Flash and got disintegrated because his own family members were going too fast and caused him too evaporate. "Hey Bart, slow down so we don't kill Wally...oops, I said that a little slow even though I'm the fastest man alive." That's a joke. In the comics, for years Wally West WAS the fastest Flash. He was the one that discovered the Speed Force and realized he was mentally holding himself back so he couldn't surpass his late uncle. For him to go out like that in such an awkward fashion felt like another kick in the teeth after what we had to endure pre-New 52.