The idea I'm thinking of is a Defense mode where you can protect the wall of the city from endless hoards of enemies. Up to 12 guardians could participate in defending a section of the wall at a time. Every 10 waves a new race of enemies would join the fray and fight the guardians as a temporary alliance so that by round 40 there would be a chaos of fallen, hive, vex, and cabal. Every tenth round, the enemies would send in majors, and every 30 one race would send in a boss(different from strike bosses). Every 5 rounds the guardians could get loot starting with greens and moving up the ranks to legendaries and the occasional exotic. This mode could work like the nightfall where if all 12 guardians die at once without being revived, they would all go to orbit and get a larger and larger rep/mark gain the longer they all lasted. Drop ships could come in getting bigger and bigger until they were like the kell's personal ship like in the one story mission. Let me know what you think of this idea and comment your own additions. Let's hope DeeJ and Bungie see this!