I don't really like Halo, but I grabbed a few of the minifigs and weapon sets, since they seemed like fun.
I grabbed the one with two cops and a bunch of weapons, one with two aliens and a bunch of weapon (one looks like a Skeksis; I think it's called a Jackal,) and a bling bag that had a cool orange and black guy with a shotgun.
I'd kinda like some kind of backpacks or something for them; maybe some knives or fantasy stuff. Any suggestions?