As for Miami, Dwyane Wade looks for his second title, while LeBron James tries to start making Scottie Pippen right (which he never could) about being a greater player than Michael Jordan. You can't even attempt to argue that until LeBron wins a title. Not when you're dealing with Jordan, who's competitive fire is greater than almost every superstar in history (probably just Russell is in the group, with Kobe a level below). The story for the Heat won't be their other guys, but if Chris Bosh continues to play at the level he showed against the Bulls, if Wade can make up for a weak (for him) series on offense and if LeBron can maintain the ruthlessness he demonstrated since Game 4 against the Celtics.
The matchup itself will be fun, as we'll wonder if Dirk or LeBron will be held by anyone. My guess; no one holds LeBron, while Dallas will survive the games which Dirk is hitting his shots no matter who's guarding him. After those two, it will be seen if the Mavs can hit from the perimeter, negating the Heat's advantage in halfcourt defense.
Prediction: Mavs in 6