This is going to be a video-full post, so be warned!
The best way to get a feel for WCS is to watch videos of past entrants and winners to see what resonates with the crowds and with the judges. Here's some past WCS winners to take note of:
Team Italy, winner 2013
Team Japan, winner 2012
Team Brazil, winner 2011
Team Italy, winner 2010
Team Japan, winner 2009, unfortunately I couldn't find one with sound.
Team Brazil, winner 2008