Dortmund usually releases new kits during the month of July. Not this time around. New home kit is set to be out around the 15th of May. Just in time for the Cup final tie with Bayern later during the month of May.
Surprisingly the jersey will be yellow and black.
The printing will almost certainly be black.
The sleeve badge will be the Bundesliga classic. The title for the season 15/16 will surely go to Bayern. Not much to do about that.