Here is the in-store poster for Sonic Adventure 2.
Notice the little "10th Anniversary" ring logo there in the top. This one, with it's large Sonic & Shadow art with big logo, is pretty decorative. There's a headline in the middle splitting them & a dot with another announcement...looks like maybe the date and price. The bottom has several nice screen shots to let you know what the game will look like, and show off a few areas.
Note that the Sonic/Shadow back to back graphic with the sort of nebulous background here WAS used for an actual wall-scroll that was sheerly decorative.