My friend and I were discussing this the other day; what if there was a strike that took place in the tower? Either that or a public event. Basically one of the alien races decides to attack the tower and all the guardians there have to fight them off in different sections of the tower. It would be cool if they expanded the tower area for this purpose too. I think the Fallen attacking would make the most sense. Plus all the NPCs in the tower could join in the fight which would be pretty awesome. I mean, who doesn't want to see Lord Shaxx kick some ass?