im assuming its gonna be some sweet horde/survival mode, but not like horde at all, just a vague similar idea. horde has waves, but i dont expect bungie to follow suite. Think bigger, think about how sweet bungie can make this, while encorporating it with forge, and forged maps. you could forge your own survival gametype map, place all the weapons, vehicles and so on. build a crazy base structure to defend yourselves in. how about fighting off a scarab or two in firefight. enemies comming in on banshees and so on. should be sweet.