A few months ago, Blizzard asked the community to submit their dances for a chance for them to get into the game. Blizzard has finally released their choices on which dances are making their way into Heart of the Swarm, showcasing the dances in a video.
http://www.youtube.com/watch?v=i_34Z0j4K_Q
Source:
Battle.net - Community-Submitted Dances Coming in Heart of the Swarm
