You should make a Randall the vandal like character whom everyone will love. Have him/her change to random locations on different planets each week so players will hunt him down (or maybe one specific planet). It could be like the Xur where YouTubers & websites could track him, & killing the little crazy health bastard would be just for fun or possibly give a fun reward for the first time a player kills him every week (nothing too big, like a rare class item engram, motes of light, or 10-20 planet materials-which is what I'd prefer). Killing him would give the player an item like a "Intel codes" or an item that could Easter egg one of your early halo or pre-halo games! This item is what the player would hold onto until he/she gets to the tower & gives it to the vanguard class leader person (forgot what they are called). I just think it would be fun if we had an enemy to love (to kill). I just imagine it would be fun to stumble upon this guy. It would also be a much greater hunt than Xur and a way to get players out in patrol. Please bump if you like this idea.