Case rulings on this have been erratic; the most famous is when 40-odd words of President Ford's memoirs were published by a newspaper, which was successfully sued for infringement for posting "the heart of the work." However, the memoir was, at the time, unpublished; in effect, they were slapped for posting "spoilers" as much as for copying.
To be fair, it was just "spoilers", but a specific spoiler that was the thing most people wanted to know from Ford (why he pardoned Nixon.)
Which means that the importance of the spoiler is probably relevant in any case. If tomorrow I posted one page from Blackest Night 8 which showed what heroes are being resurrected at the end of the event, then I would expect to be sued by DC within a week, and I'd expect to lose the case badly. If I posted one page from Blackest Night 8 where Larfleeze sees Gonzo on TV and makes a comment about how he doesn't look anything like him, DC wouldn't bother.
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To be fair, it was just "spoilers", but a specific spoiler that was the thing most people wanted to know from Ford (why he pardoned Nixon.)
Which means that the importance of the spoiler is probably relevant in any case. If tomorrow I posted one page from Blackest Night 8 which showed what heroes are being resurrected at the end of the event, then I would expect to be sued by DC within a week, and I'd expect to lose the case badly. If I posted one page from Blackest Night 8 where Larfleeze sees Gonzo on TV and makes a comment about how he doesn't look anything like him, DC wouldn't bother.