The first Valkyria Chronicles game was set in an alternative version of Europe in the year 1935. Could this Japanese teaser site with "Code 1935" in its URL be for Valkyria Chronicles 3?
Sega has apparently registered "valkyria3.jp", leading many to believe that the Japan-based game company was working on another entry in the Valkyria series.
The countdown clock ends on September 16, which is when the Tokyo Game Show begins.
Code 1935 [Official Site]