The Recent/Still Viral Campaign

Hey guys. So first off...this is all speculative and simply asks some pointed questions. Perhaps it is just me, but I can say I have never seen a movie with a viral marketing campaign continue said campaign after the movie has been released. Typically, the information and 'fun' of a viral campaign is to generate interest in the upcoming film, so why in the seven hells would a company continue to fund a viral campaign after the fact? One could argue it is to keep interest up until home release via Blu Ray and DVD, or even a re-release in theatres, but that whole concept seems contrite and wasteful. Even the great films don't keep the marketing going until the home release, let alone a film that has received a mixed review. So...the big question of why? Perhaps, and this is a big perhaps, the reason Prometheus seemed to be poorly told is due to the fact that in reality, RS and Co. were actually filming two films in one fell swoop. It is not that far fetched considering for serialized films are doing this more and more ever since The Matrix and Lord of the Rings. Let's not forget The Hobbit is two films back-to-back and Avatar 2-4 are all planned to be filmed back-to-back as well. But why haven't we heard anything of this? Well, the intrigue. Look at all the great discussions going on about the context of Prometheus. Now, we all know these conversations will continue for quite some time, however, if general knowledge of a sequel filmed at the same was widely known...I can bet most of the conversations would not be as in depth or as interesting because people would have the mentality of "I'll wait the X amount of months to get my answers." It would be cool to think RS and Co. intentionally kept the sequel secret for a 6 month or so period to encourage some insightful conversations about the film and while those discussions are reaching a pinnacle *bam* sequel announcement. The buzz created by such a ploy, coupled with a continuing viral campaign, would do wonders for the study and be a curiously smart move by the marketing department. But what about budget? With a director like RS who likes the use of real set pieces, it would make sense of them to re-use as much of the Prometheus film's set as much as possible. Financially it makes sense because then the studio would not have to re-hire stage crews and designers for a good amount of sets, since they really would just need to make minute detail changes - which makes a lot of sense considering the fickle nature of our world's economic stage right now. If we use the idea of re-using the sets for a film being shot at the time as Prom., then the overall budget for the sequel would be signifcantly less as some set pieces would already be in existance. I also think, with how Prom. seemed to be so riddled with holes, a secondary film was indeed shot at the same time or closely after. RS is not a stupid man and I don't believe he would be content with the final product of Prom. without a trump card up his sleeve to really bugger with our minds. I could be wrong and put too much faith in RS, but Prom. has left a bitter taste in a lot of RS fans mouths and perhaps this is the reason why. All speculation and such, but it is the only thing I can think of for the viral campaign to continue and this cryptic date. I do not agree with sentiments of Prom. being released to international locations on that date, especially considering the phone number given is an American number. That right there is evidence enough of something else. I also don't agree with the fact of a theatrical re-release, not for a movie that received luke warm reviews. Fox and RS have something big coming down the pipe. It is why they are spending the continual funding for this viral marketing campaign for a film already released. It why there are cryptic dates and phone calls and I would put my money on why Prom. seemed to be quite a weak film in terms of story.