Hi aikam,
I don't think so they will ask 4 re medicals cause your application was in process since Jan 2015 and your medicals got expired in the month of June all this time they should have completed the background check (security, criminality and rfv check) and should have asked for ppr in fact they were sleeping on the file for almost 6 months they probably would be extending your medicals I read an article in cic website regarding re medicals for 2012 though the bulletin has expired at times immigration officer still follows it here is the link
http://www.canadavisa.com/canada-immigration-discussion-board/medical-exam-validity-extension-for-additional-12-months-new-cic-bulletin-t106229.0.html
http://www.cic.gc.ca/english/resources/manuals/bulletins/2012/ob423.asp
Let's see what ndvo does
This is fantastic piece of information and hope ndvo still follows it. If so it gives lots of hope to applicants close to 12 months of original medical done. It can be also cross checked from applicants who were asked for remedical. They can actually let us know as to how much time (months) has lapsed since they were asked for remedical.