Here are 2 cool 2-page spread ads for Sonic 2006. The first one features Shadow (back on his motorcycle), wierd Eggman, Elise and Silver, who is glowing psychic green while throwing a bomb. It says "Sometimes Speed isn't Enough"

the other has only Sonic running through a city with (presumably) missile-smoke trails in the background. The Sonic graphic is nearly the same as before, only now his hand is open. This one says "Limits as you know them are about to be broken, experience a whole new blue" These could be found in various USA magazines such as EGM and PSM.