It would certainly help to know what your teams needs are, specifically with respect to C/W/D/G and also what kind of players are in your farm right now. Your needs will change with each trade if you're planning to make several, but I suggest you make your biggest splash first. Trade Datsyuk to a contender for one prospect with a career upside (90+ points) and another second tier prospect. Then I would trade Kunitz, Kronwall, and Iginla in that order. I feel you could probably keep Koivu, and guys like Richards, Heatley, and Marleau just won't fetch much right now. I would pray that one or two of them have better seasons next year and you can flip them to a contender at that time.
When you're making a rebuild happen, think sell high and buy low. Best targets will be guys who take a circuitous route to the NHL, but have big upside (apparently like Nazem Kadri has). Also guys who got hyped and underperformend (e.g. Granlund this year).
The rest depends on your league and the GMs. Post some specifics ere when ready and get the community to help at that time. Good luck.
10-Team, Custom Keeper. In this league GMs sign their own contracts at an auction for a specified price and term up to 4 years.
Points
G(3) A(2.5) +/- (0.5) SOG(0.1) FOW/FOL (0.05) HTS(0.1) BKS (0.1)
2C - McDavid, Pettersson, Barkov, Kopitar,
2RW - Lindholm, Perron, Reinhart, Killorn
2LW - Draisaitl, Svechnikov, Schenn
3FWD From above FWDs
6D - Karlsson, Dahlin, Gustafsson, Theodore, Edler
2G - Varlamov, Greisss, Murray, Mrazek
IR - Hamilton
6FARM - Kakko, Mittelstadt, Francouz, Borgstrom