There is a reason one can find similar trends among many developing studios. Pre-production, post-production, burn phases, sales boosting, they all pretty much dictate a certain course of events over time. So while i would not count on this with a hundred percent certainty? This delay between latest patch and incoming one signifies more than a "big" patch in the works. Personally i'd expect its release to just 'happen' to coincide with a Gold/Remastered edition and/or extra platform ports. Including but not necessarily limited to your Linux one.
