Looks like it's official. This image was released from Spiderman 3's official site. 

Talk about Sandman on the message board.

Thomas Hayden Church the next villain for Spiderman 3 has been on a number of movies and tv shows including the NBC sitcom Wings where he played a mechanic, Ned and Stacey where he played a businessman who hires a woman to play his wife to look good for businesses deals, the bad guy from George of the Jungle, a bad guy in the western Tombstone with Batman's Val Kilmer,  and he played in the recent movie Sideways.

Hoped you enjoyed the Spiderman wallpaper images and pics.