The lead writer for Battleborn, Aaron Linde, has reportedly left developer Gearbox Software. He joined the US company in late 2013, although now the writer has confirmed that he is off on new adventures in the Pacific northwest area, as confirmed in a recent Tweet.
Although this might simply be one of the standard comings and goings that happen at a studio after a game has been finished, it certainly doesn't look like Battleborn will get more story-driven content, at least not content written by Linde.