This happens every year. The WGA disqualifies screenplays that are obviously destined for Oscar noms, even wins. 12 Years a Slave and Django Unchained are just two examples of screenplays WGA deemed ineligible and yet went on to win Oscars. This year we're seeing The Theory of Everything and Selma as two of the few Oscar hopefuls who will not be able to add WGA nominee or even WGA winner to their list of accolades. Other than Selma (Mr. Turner is also ineligible), I don't really think any of the excluded have a shot at winning the Oscar (adapted screenplay, while dire at the moment, will most likely go to something like The Imitation Game or even Unbroken before going to The Theory of Everything). Still, this allows some also rans to make their way to the WGA nom, despite little to no chance at an Oscar nomination.