The entire industry probably knows how much Kojima has fallen in love with Twitter so it comes with little surprise that he's teasing an announcement on said social networking platform. According to Andriasang, Big Boss Kojima teased his followers with a rather curious tweet saying that he has something to announce over the weekend.
"Typhoon 4. It looks like it won't have an effect on the weekend. Thank goodness! However, my health is bad. Prior to TGS, we'll have a big announcement (?) on Saturday or Sunday, so I must recover."
He later added, "ZOE3 and so forth -- it's not that big an announcement. However, I think you will be happy."
It'll be big, but not as big as a ZOE3 announcement, what could it possibly be? Might be Metal Gear Solid 5, might be Metal Gear 3DS, your guess is as good as ours. The weekend couldn't come any sooner, here's to hoping Big Boss gets better in time for the announcement.