Hideo Kojima, creator of the Metal Gear series, has tweeted a picture indicating at a new Metal Gear Solid Collection.
We have had the Metal Gear Solid HD Collection, which included Metal Gear Solid 2, Metal Gear Solid 3 and Peace walker. Then there was the Metal Gear Solid: The Legacy Collection. Could this new collection be all the Metal Gear games? Not much more was posted other than this picture, Kojima did put the text "本読み中。" Which seems to translate to "While reading this" or "in the middle of reading this".
He also posted a picture of some Metal Gear chocolates. Whether these Metal Gear themed chocolates relate to this collection, we'll probably learn soon.
With TGS just around the corner and with Kojima Productions revealing more MGSV info tomorrow, no doubt we will learn exactly what this Metal Gear Collection 2014 will entail.
Source: Kojima's Twitter