Per our friends at ESPN, here are our potential building blocks:

LaMarcus Aldridge, Carmelo Anthony, Harrison Barnes, Bradley Beal, Jimmy Butler, Mike Conley, DeMarcus Cousins, DeMar DeRozan, Andre Drummond, Kevin Durant, Kenneth Faried, Rudy Gay, Paul George, Draymond Green, James Harden, Gordon Hayward, Dwight Howard, Andre Iguodala, Kyrie Irving, LeBron James, DeAndre Jordan, Kawhi Leonard, Damian Lillard, Kevin Love, Klay Thompson, John Wall and Russell Westbrook

My effort:

LaMarcus Aldridge
Kevin Durant
LeBron James
Kawhi Leonard
Russell Westbrook

DeMarcus Cousins
Carmelo Anthony
Paul George
Klay Thompson
Jimmy Butler
Damian Lillard
John Wall

Update: As mentioned in the comments, Aldridge is out. LeBron and Fartsmello are both considering dropping out as well.