Comic Con posters are always a pretty good bet. Freed from the need of appealing to a wide audience they tend to go for something stylish and unusual. Also, they generally don’t showcase the actors or shots from the movie, which cuts down on the bad photoshop.
Add to that a Soderbergh movie and the odds of getting something fun become very high. And indeed, here we have a very fun poster. Unsurprisingly, considering the director’s proclivities, the poster goes for old-fashioned instead of edgy. Works for me.