The link between El Nino and the Indian summer monsoon was established a long time ago, with El Nino favoring a poor monsoon.  CPC is not currently doing much additional work on this relationship, but I'd assume other organizations, especially in India are. For 2015, the IMD issued the following press release on April 22/

http://www.imd.gov.in/section/nhac/dynamic/eng_lrf1.pdf