It seems like the cat has been let out of the bag, as a Best Buy listing for Nobunaga’s Ambition: Sphere of Influence.
While the game is a Playstation 4 exlcusive that saw a release in Japan back in December of 2013, we originally translated the name as Nobunaga’s Ambition: Creation in English. There is only one Nobunaga’s Ambition game on the Playstation 4 to date, so this must be the very same game.
It’s worth mentioning the game has also been available across PlayStation 3, PS Vita, and PC, however the Best Buy listing only mentions the Playstation 4 version.
We’ve reached out to Koei Tecmo for a comment.