Today Sega opened up a strange new teaser website in Japan which can be found here. Currently little is known about what this game may be outside of the fact that the site is dubbed “A.D. 2021 Tokyo” and the fact that the artwork on the website shows what appears to be giant flowers growing in Tokyo while dragon-like creatures fly overhead.
As you can see on the teaser site, the game will be fully revealed in Weekly Famitsu which will be released on Thursday, but leaked on Tuesday as is standard with Famitsu issues. There have been some rumblings on Japanese websites that this game could be Seven Dragon 2020: 3rd Encount and given the look of the artwork, they are probably right.