User blog comment:DarkIngRidley/Possible Season 7 references, as early as Season 5?/@comment-1509826-20120519224707

I doubt it, season five was ment to be the final season, so its unlikely they would plan that well for the future, hence why season six turned out so unferfilled, and its to lose to be sure, after all there are mentions of the devil, in season one, but that doesn't mean there foreshadowing for lucifers rising in season five. So unless you can find anything more concrete, I would have to say, no, Its to unlikely.