Strange Visiters in a Strange Place

After a mysterious entity pulls Dick Grayson, Jason Todd, Tim Drake and Damien Wayne out of space and time to spare them from the latest reality changing event in hopes they can find out what happened and how to stop it, then throws them back into an unfamiliar world where friends are enemies, enemies are friends, and their most important relationships have been majorly altered, even the four protégés of the big bad Batman are out of their depth. How can they save a world that doesn't know it needs to be saved?