Paul Millsap - 2015 Free Agency
Kyrie Irving - 2015 Free Agency or via trade prior, Cavs not willing to give max atm.
Marc Gasol - 2015 Free Agency, especially if they have another mediocre season
Kevin Love - Via trade in 2014 or 2015 free agency (looks like Boston's getting him though)
Kevin Durant - 2016 Free Agency a.k.a "The Dream"
LaMarcus Aldridge - 2015 Free Agency, especially if Portland takes a step back next season.
Not really a very long or exciting list tbh