I don't think we are going to be players in the UFA market this year for obvious reasons (save for those bargain basement deals)... but I took a look at next years crop (so far) and the amount of RIGHT D is astonishing.
Alex Pietrangelo, Justin Schultz, Tyson Barrie, Mike Green, Jared Spurgeon, Zach Bogosian, Sami Vatanen, Justin Faulk, TJ Brodie (lefty but plays RD), Chris Tanev, Travis Hamonic, Justin Braun, Radko Gudas, Trevor VanRiemsdyk, Mark Pysyk, Matt Benning, etc....
Clearly several will re-sign, but there could be a few targets here.