Pacers trades: Danny Granger + 1st Round Pick (2014) to Atlanta, 1st Round Pick (2016) to Golden State
Pacers get: Harrison Barnes/Klay Thompson + Andres Biedrens
Atlanta trades: 2nd Round Pick to Golden State (or just nothing)
Atlanta gets: Danny Granger + Richard Jefferson + 1st Round Pick (2014) from Pacers
Golden State trades: Richard Jefferson + Andres Beidrens + Harrison Barnes/Klay Thompson
Golden State receives: 1st Round Pick (2016) from Pacers, 2nd Round Pick from Atlanta
Why for Indiana: They shed Granger's contract for a rookie contract of Barnes or Thompson, and while taking on Beidrens contract sucks, he can still give some bench minutes.
Why not for Indiana: Trading two 1st round picks is too risky in today's NBA, and while Barnes or Thompson would fill a shooting need, taking on Beidrens probably doesn't allow them to resign Lance. Also a lot of player movement for a championship contender.
Why for Atlanta: A 1st round pick in 2014 is huge, they're like gold, Granger gives them a productive vet for the season (if healthy), and plus they needed to fill salary for the season anyway.
Why not for Atlanta: Jefferson's contract sucks, and they may feel, why not just trade with Golden State alone to get Barnes or Thompson.
Why for Golden State: Clears the cap space needed to sign Dwight Howard, while giving them an extra 1st round pick they can send to the Lakers.
Why not for Golden State: Well if Howard doesn't go, it's all moot...and they may not want to part with Barnes at all, they may be trying to pawn off David Lee's contract.
Got about a .0001% chance of happening for the reasons above, but hey, I'm bored...