At first I was positive the second track would be whichever the next single will be. But then I remembered that Wretches and Kings was released after The Catalyst. And as much as I'd think it would be Lost in the Echo, at the same time it would be really odd to release the lead song of the album, but Given Up sort of destroys that idea as well. I think the safe bet would be Lost in the Echo, but already previewed songs like In My Remains or Castle of Glass are also contenders.