Bad idea. Why risk ruining chemistry and having him come back only to be rusty? The Magic are good enough to potentially win the Championship, they don't need to have Nelson come back and risk messing things up.
Because he was their starting all star calibur PG for half the season. Because if he is healthy, it makes stronger a position where the Lakers are weak.
Yeah but even if he is healthy now who says he is starting calibur if he hasn't played in a while? And the Magic have gone through the playoffs with Alston and including Jameer could make Alston play worse and could disrupt the team as a whole. It just seems like an unnecessary risk that's not worth the possible reward.
It's not like the Celtics - the Celtics with KG as opposed to without are an entirely different team in a very negative way but the Magic with Alston and without Nelson are still a really good team, even if they aren't perhaps quite as good as the Magic with Nelson playing his best.
Edit:
If we're talking about having Nelson play instead of Johnson, then you have a good idea there. Johnson has been okay for them but nothing to write home about. Nelson could definitely be a good guy for their second unit, and if it doesn't work out Johnson probably wouldn't be too insulted by not playing a game or something.