Rondo wasn't "great" when they won the championship. He still had some huge holes in his game. Derek Fisher is by no means a great PG. Parker is very good, but he's no Nash, Paul or Williams. Take a very good PG, give him a couple of great players, you have a shot at a championship. Take a great PG, play him next to a few good players, you generally come up short.
If the trade gives Deron a chip on his shoulder, NJ has a remote chance at the playoffs. Not likely, though. Indiana and Philadelphia have been playing decent ball (both 7-3 in their last 10). So let's assume the WORST of those teams finishes at Indiana's current .464 percentage. That's 38 wins. New Jersey would have to go 21-4 to to win 38 games. I don't see that happening.