So let's see what this miniseries has to deal with/recap for those who missed future state and Infinite Frontier. Spoilers of course and don't read if you don't want spoilers.
spoilers:end of spoilers
So with his powers on the fritz Billy has to deal with: 1. The Rock of Eternity is trapped in hell. 2. Darkseid murdered the Wizard. 3. A black adam from the future is locked in the rock of eternity wanting to get back to his unborn child at all cost. and 4. Oh yeah the Unkindness is in there, you know the future amalgam of the four horsemen of the apocalypse that ruined Titans Academy in the future, the power of shazam, and raven that tried to kill/erase all of existence. Good freaking luck with all that Billy.