You had to know it was only a matter of time. They've been out there, watching us for years just waiting for the chance to force themselves on to your XBLA avatars. They've plotted their hostile attiring and have chosen now to take action.
You can nab a t-shirt in two flavors for 80msp, a Tripod inspired helmet for 160, of your choice of three pets for a measly 240. If you really like War of the Worlds I'm sure this is neat, but it's not the coolest thing you'll dress your avatar in this year.