Kojima is editing a new trailer, as shown by a photo posted on his Twitter account. This is likely for Metal Gear Solid: Ground Zeroes, which will be demonstrated at GDC at the end of this month.
Let’s work on editing until lunch time.
Earlier he posted this comment, which is probably about the same trailer:
Struggling to make sometime to edit new rough trailer. The music is too long, tempo of the music is awkward, and the game image is too short.
Several members of Kojima Productions are heading to San Francisco to demonstrate several features of the Fox Engine, and show off Metal Gear Solid Ground Zeroes.
Hideo Kojima will also speak at the event, and this is probably the trailer that will be shown. His presentation is on March 27.
Source: Hideo Kojima’s Twitter