Destiny speculation TIME

So, I am still so -blam!-ing stocked up on Destiny vibes right now. And been thinking, I know damn well there will be a city wide world event. Come on, why have big walls, if their isn't an enemy on the other side trying to kick in the door? Imagine, coming back from a long and weary mission, and stop by the local pub to drink away some of the mortar fire you endured the last few days. All of a sudden an alarm that rings through out the city, the Tower's robotic guards assembling to the wall guns drawn, you glance over your shoulder out the window and see bad ass after bad ass Guardian making there way as well. *click clack* is heard through out the bar, and you turn to your mates, "Damn, and I just got comfy". Just imagine, you glance over that wall, and see multiple drop ships coming in and deploying spider tank, after spider tank and a flood of Fallen all while bucking shots galore and you and every other person on that server has only a moment to keep the walls from falling down What if you could go outside the walls and charge head on at the enclosing enemy? Ah, the speculation, but I bet it will happen.