The Magic add another high-flying scorer to their wing rotation. A lineup of Lewis, Turkoglu and Carter could create matchup problems all over the place for opposing defenses.
In the process, they also solve the Jameer Nelson vs. Alston dilemma by sending Alston out of town.
Battie is replaced by Anderson, who is younger, a better shooter, and basically a better player anyway.
The Magic do, however, take on much more salary with Carter's contract. This makes re-signing Turkoglu and Marcin Gortat much more problematic.
For the Nets, the motivation is simple. In Alston and Battie, they receive $16.5 million in expiring contracts. In addition, replacing Carter with the up-and-comer Lee works very well for a team trying to get younger.
The Magic are taking quite a gamble with this trade by taking on Carter. On the other hand, it could be the move that puts them over the top, and is also a quick response to the Cavs adding Shaquille O'Neal.