A few pictures from Twitter account Tony (credit here and here) taken from Connichi (one of the biggest anime and cosplay conventions in Germany) showcase a scroll with the Monster Hunter 4 logo displayed. An additional picture was found by Neogaf user Wendler. What makes this even more interesting is the Wii U logo shown at the top:
The logo, funny enough, is actually titled Monster Hunter 4 Ultimate, which is the title of the re-released version of the game in other countries. It seems there’s a good chance this rumor might be true but always take rumors with a grain of salt.