Oh dear, talk about not getting what people over there like, and thinking a game about a talking hedgehog had to be in the style of a First Person Shooter:
http://www.officialnintendomagazine.co.uk/article.php?id=22230
Different eh? Always a bad sign.
So somehow, they saw Call of Duty and Gears of War, and thought making a Sonic spinoff along the same lines would work... oh great.
http://www.officialnintendomagazine.co.uk/article.php?id=22230
After Sonic Adventure, we had two studios, in the US and Japan
The Japanese Studio was to develop a Sonic game in the standard style, and the US studio was to develop something different which could contribute to the Sonic franchise.
Different eh? Always a bad sign.
That background generated the Shadow game as he appeared from Sonic Adventure. We wanted to offer other game systems to attract a different audience from traditional Sonic fans. In the US, first and third-person shooters were popular and we decided to go with a character who could work with them.
So somehow, they saw Call of Duty and Gears of War, and thought making a Sonic spinoff along the same lines would work... oh great.