With Post Malone, Shawn Mendes, Tiesto, and Armin van Buuren being hinted for Untold, this gives us a good idea of what to expect headliner wise. Especially because mendes and Post malone were mentioned by Leaks.
It will be wise to copy your Queue-ID to notepad etc once you get in the queue. That *should* allow you to rejoin in the same place if your device, or anything else, crashes.