Yesterday, we brought you word of a new Nintendo DS co-op title, Dragon Ball: Origins 2, that is slated to hit stores this summer. Today, we bring you the first trailer for the game, which shows off a bit of the co-op challenge mode in action. Based on what's shown in the trailer, it appears that players will be able to use special co-op attacks to take down bosses and other foes when they team up for the challenges. Here's hoping this mode is as much fun as it appears to be, and doesn't go down the same path as other titles with these types of challenge modes.