A "pre-vis" trailer for what's supposedly SimCity 5 has appeared online, pointing to a 2013 release date. The video shows various supposed images of the game but no actual motion (pre-vis trailers are traditionally used as storyboards for the final thing).SimCity 5 rumours began to circulate last month after EA PR boss Erik Reynold tweeted: "MORE INFO! EA Maxis GDC announcement, huge event w/ special guests". A subsequent Facebook message made stronger hints that announcement would be SimCity related: "How can we change the world together? Find out when EA hosts the Game Changers event at GDC. What would you do if you had the power to change the world?"