Ubisoft working on Far Cry Primal

Ubisoft has started a viral campaign with the following picture today:

Some evidences indicated that this game could be a new Far Cry iteration, but IGN Turkey finished with the Sherlock Holmes game so early leaking Far Cry Primal:

Prehistoric setting, ice age with mammoths, sabretooths and human bones as weapons. Not bad.

Thanks, NeoGAF.