It'd be pretty cool if a unique social space opened up in the tower for all folk who have completed a full year's worth of content in the year they bought Destiny (i.e. year one completed VoG. Crota and Prison of Elders. Year two completed King's Fall and all subsequent DLC) So now, yr one players would have access. After year two, then yr one and yr two would have access and so on and so on. Each year would bring unique equipment that newbies will have to wait on.
So armor, weapons, shaders etc that are exclusive to those who have played the game through. A nice incentive and reward for those who maybe can't tear it up in Trials of Osiris, but that are dedicated none-the-less
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Private custom lobbies too