Lord saliden isn't pvp related besides his host of iron banner he was one of many guardians that fought in the great battle to protect the last city. If anything my thiery is that there is another battle on the horizon we have delt with the hive and vex but since then we have also taken care of a small portion of cabel and fallen. Opening earth sectors to the fallen from other hostiles, the will storm earth once more and we will be at war again.