The ISU still has not comunicated them officially, but thanks to icenetwork.com I can tell you the rhythms chosen for next season Short Dance.
At an ISU Ice Dance Technical Committee meeting during these 2012 World Junior Championships, committee chairperson Halina Gordon-Poltorak announced that next season junior ice dancing teams may elect to include hip hop in their short dances. The decision is likely part of the ISU's efforts to appeal to a younger audience. Junior short dances can pair hip hop with Blues and Swing rhythms. Two sequences of the Blues pattern (compulsory) dance are mandatory.
"But it must have a clear rhythm," Gordon-Poltorak said. "And we do not want to hear any obscenities," the long-time U.S. Figure Skating official said. "You coaches should check the lyrics."
Speaking about lyrics, one of the proposals on the docket for the 54th Ordinary ISU Congress, to be held June 11-15 in Kuala Lumpur, is whether to permit all disciplines to use music with lyrics in competitive programs. For a long time now skaters have asked for this, and you'll remember for sure Florent Amodio's and Brian Joubert's defiant attitude in 2011 and in 2008 worlds, when both chose to use a music with lyrics.
Next season's senior short dance will include one pattern of the Yankee Polka. This may be combined with any style of Polka, March or Waltz rhythm. For the Olympic season, 2013-14, senior couples will include the Finnstep (a type of Quickstep) in their short dances.
On the free dance front, Gordon-Poltorak stressed that there must be at least one clear change of tempo and one clear change of expression.
The committee is still listening to suggestions and further changes may be announced prior to the start of next season.