As pointed out by our users, Sony Online Entertainment has trademarked the site and name "H1Z1", a possible nod at the earlier news that SOE was working on a zombie-themed MMO. According to a Twitter post by SOE's CEO John Smedley, the game will be revealed today at 5:00 pm PST (8:00 pm EST) and that folks will be able to play it "fully" in the very near future.
watch http://t.co/OfEekcv325 tmw between 5-6pm PST if you are interested in the new game we haven't announced. there is gameplay footage
— John Smedley (@j_smedley) April 8, 2014
Stay tuned to the link above at the appointed time to find out more!
In the meantime, check out the H1Z1 teaser site.