As summer blockbusters recede from view and the conversation turns to Serious Movies, awards-season prognosticators pose the kinds of queries typical of their annual sport: Will Viola Davis campaign as leading or supporting actress? Will this finally be Annette Bening’s year? But perhaps the biggest question looming over February’s Academy Awards is whether its crop of nominees, to be announced in January, will warrant the revival of the #oscarssowhite hashtag used to describe the last several ceremonies. This year, the Academy announced changes to its voting and membership rules and invited its most diverse new class in history.