I still think that with the way this locket has been shown, and constantly teased us, and that they've made it SO obvious Rollo is up to something which may not be good for Lelouch, they'll something completely different and have the two brothers officially join forces in the end. Just because A. With Suzaku and the KoR, Lelouch needs more friends and B. They've hung out for maybe a year now, and have apparently been quite close, could either of them really throw that all away?
Plus, it's a very pretty locket Lulu-nissan got for his one and only 'brother'
