So I recently found this while browsing around twitter and I thought it might be an interesting topic of discussion : http://info.nicovideo.jp/odottemitaoff/index.html
Apparently on March 1st there will be a new event being held called Odottemita Off. I believe they said this was also related to a similar nico dance festival event last year.
It looks like there filming some group dances and were recruiting people for it and there are also going to be preformers doing originally choreographed dances as well.
It seems cool, I am definitely looking forward to seeing this!