Kojima Productions has posted job openings for artists, engineers and other positions. The listing specifically says it’s for the “latest Metal Gear Solid targeted for high-end consoles and PC.” Kojima Productions will be at GDC looking for new candidates.

This basically says that either Metal Gear Solid: Ground Zeroes or Kojima Productions will be on PC for sure, although Konami and Kojima Productions have not announced this publicly.

Here’s the job listing text…

BIG BOSS wants YOU!
THE “NEXT” MGS
DEVELOPMENT WITHOUT BORDERS
GDC 2012 Booth ?1914

Kojima Productions will be returning to the GDC Career Pavilion (March 6th – 9th) to search for skillful engineers, artists, and game creators including:
?Project engineers for the latest Metal Gear Solid targeted for high-end consoles and PC
?Engineers to help develop next-gen game engine technology for use with the “FOX Engine.”
?Kojima Productions Brand Manager
If you are interested in becoming part of our team, please visit the Konami Group booth, #1914, in the Career Pavilion.?

You can look at the job listing in full on Gamasutra.