Indianz.com has an important story up about a victory against DAPL.
NOTE: The TL;DR is that the expedited process for issuing permits for the project was illegal, DAPL might be shut down (at least temporarily), and the uncertainty created by the illegitimate permits might further delay fully connecting DAPL to the Albertan tar sands oil projects.
The Army Corps of Engineers (ACoE) has a long history of neglecting not only treaty rights but also duties imposed by the National Environmental Policy Act (NEPA). That act requires certain steps to be taken BEFORE concrete actions like issuing permits can be legally undertaken. There are good reasons – have been good reasons – to believe that they did not meet the legal prerequisites for issuing the DAPL permits and today a federal judge agreed.