Documentary sequels can tend to divert in focus from their predecessors, sometimes enough to become their own separate projects instead of being direct follow-ups as originally intended. Remember how Michael Moore's plans to do a Fahrenheit 9/11 sequel evolved into Capitalism: A Love Story? According to The Documentary Blog, Spike Lee's sequel to When the Levees Broke: A Requiem in Four Acts has also now gone in a slightly new direction, at least for its climax.

The new two-part doc, titled If God is Willing and Da Creek Don't Rise, does still revisit the Hurricane Katrina tragedy five years later as planned, including a look at how hard it's been for folks to return to the area, but it's also going to veer off and explore the BP oil spill, as well. Reportedly the doc, which premieres on HBO August 23rd and 24th, was supposed to conclude with the New Orleans Saints' Super Bowl victory (back in January), but Lee's crew has continued to make trips throughout the year and shot footage for the film as recent as two weeks ago.