If GoW2 includes unlockables what would you like to see unlockable? Personally maybe a set of armor but I would love to have some unlockable characters. Maybe after beating it on Insane we get an achievement and unlock a playable version of Chuck Norris. After getting Seriously we unlock a playable version of CliffyB. Cool things like that and they even have cool sayings to yell during battle.
What would you like if they included unlockable things in GoW2?