ok, so Hideo Kojima said that mgs4 was the last metal gear solid game, then mgs rising was announced. this was ok, because it is not about snake, and its a prequel to 4. and now...he is considering making a 5. I don't know about the rest of you, but I think he needs to stop, mgs is an awesome series, great story line and just generally entertaining, but I personally want to see what else he can make while not trapped in the mgs universe.
The story virtually ended in 4. So I don't know how can they continue it without rebooting it or hurting story(unless they can make a new protagonist or Raiden).
The thing I didn't like about metal gear was that there was more cutscenes than gameplay. If I wanted to watch something that long I would watch a movie. The story was finished in 4 and continuing it will result in the Kojima catching the "George Lucas" syndrome.