I am trying to make a One Bomb Assault/One Flag (either one) map with Bro Spawning. Basically I am making an "invade the HQ" kind of map and want it to be so that if one guy stays alive inside the HQ, all of his dead teammates can spawn on him instead of having to spawn all the way back outside. Could this be done perhaps with invasion? I would only want one phase in that case if it is possible.
As far as I know Bungie has not yet released any gametypes besides slayer with bro spawns enabled. You can use invasion and make two phases of territories with 1 second capture times before the assault phase so those phases are essentially nonexistent. Neither invasion (nor Bro Slayer from what I remember) will allow the entire team to spawn on a single teammate; the team will always be divided up into fire-squads, usually three of them.