As the description above says, Shazam! is simply your typical scrambler type of ride.
The only change that ever really occurs is during Fright Fest (September and October). During Fright Fest, Six Flags. St. Louis will place mirrors around the scrambler to give a bit more confusing look during the ride.
When the ride switched to Shazam!, it did a good job with keeping a DC theme with Freeze nearby. Would not mind if more rides in the area stuck to the theme as well....