After playing destiny and exploring the lore something that I thought would really cool would be to add a multilayer mode where you hold off waves of enemies at the wall trying to invade the city. Think about it, guardians fight to push back the darkness throughout the story, were defending the last city. I'm sure that occasionally the fallen have tried in mass to invade and destroy the last city. Wouldn't it be fun to play a six person cooperative mode where you held of increasingly difficult waves of enemies at a few different locations around the wall? Imagine playing with a fire team of you friends trying to hold off against numerous enemies and a few walkers! That would be amazing to me, what do you think?