"Challenge"
The total of the Corps is recalled to Oa. Once they arrive they are informed by the Guardians that a former member of their race, Krona, is preparing to destroy this portion of the multi-verse. After the retelling of what he kind and what the other Oans were required to do to stop him at that time,the Corps are dispatched to set postions and the Guardians take up "arms" to prevent the pending Apocalypse.