Great idea, very well said and thought out. Perhaps it doesn't even need to be confined to only the tower, although I think that is a GREAT hook. You could (just spitballing out loud here) theoretically have an event like this on every planet. On top of the "save the tower" weekly event, u could have also have a 'save Mars from aassive unified cabal assault', perhaps even having some sort of step-by-step war, if we loose on one planet, its becomes even harder on the next planet. Someone can definitly take these ideas and improve upon them (cmon bungie!) but the framework looks like a winner. I really like your initial idea and that little rant of mine was just my creativity(stupidity?) running rampant. I think your idea would really help to bring a massive scope and "legendary" feel back to the game, reinvigorating the player base.