The story could start with the main characters receiving a package containing the DLCs, which in the game's lore might be a literal box that opens up to another dimension or something. Then they get pulled into separate adventures but have to manage both. Maybe there's a conflict between the two storylines, or the characters from each DLC have some interaction.
Check if there are any specific items or locations that are unique to each DLC. For example, in "Mad Love," there's the Torgue's Love Car, which is a large, dangerous robot. In "Assault on Dragon Keep," the Dragon King is a central antagonist. These elements can be used to create key scenes in the story. borderlands 2 ps3 dlc pkg full
I should also mention the setting of the Borderlands world, which is a lawless, chaotic planet with a mix of sci-fi and fantasy elements. The contrast between the medieval dungeon and the Wild West setting could be highlighted. Maybe include some references to the game's dark humor and over-the-top violence. The story could start with the main characters