The end of the trailer also reveals a GameStop pre-order bonus, namely the "Monkey Business Pack," which includes "four missions hosted by Hurk and his bomb-carrying monkeys" and "two bonus ways to humiliate your friends." If poop-throwing is involved, you can count us out.
Interestingly, a UK version of the trailer features different pre-order content. Specifically, UK pre-orders will receive the "Lost Expeditions Edition" of Far Cry 3, which includes two bonus missions and an in-game flare gun. Looking over the North American retailers listed on Ubisoft's own Far Cry 3 website, it appears that only Best Buy is offering the Lost Expeditions Edition. We've contacted Ubisoft to see if the content will also be offered by other retailers.