Here's a look at what the Quake Champions Pack includes:
All 11 current Champions, including Ranger, Visor, Scalebearer, Nyx, Anarki, Clutch, Sorlag, Galena, Slash, BJ Blazkowicz from id Software’s Wolfenstein, and the new DOOM Slayer All future Champions, including at least six additional Champions expected to release before the end of 2018, and any that follow An exclusive Early Access skin for series diehard Ranger, available only during the Early Access period for Champions Pack players Three Reliquaries (loot chests containing three in-game items for profile, Champion, and weapon customization, like skins, shaders, nameplates, and more)
Further details will probably be shared by AMD later today.