After (irresponsibly) tweeting ambiguous notes like, "Fake or real, we love a bit of speculation! #ogre #mgs5," Konami's UK account directly clarified that, "Seriously, just in case the #pinch #salt hashtags weren't enough - the chap who claims to have set up the fake rumours has been in touch," as spotted by Kotaku's Jason Schreier.
Project Ogre is Kojima's current in-development game, though few details are known about its theme, or gameplay, or ... well, much of anything regarding it. Kojima has also spoken of a fifth Metal Gear Solid game, though its unclear if development of that game is already underway.
Whether or not the game was shown behind closed doors, Kojima was definitely at Comic-Con this past weekend, and he appeared to be showing something secret. Epic Games design director Cliff Bleszinski tweeted, "Just got pulled into a back room at Comic Con by @HIDEO_KOJIMA_EN and showed some crazy new secret stuff. Wow." We're doing pretty much everything we can right here to not make a lurid joke.