The Miami Heat, known for superstar trio LeBron James, Dwyane Wade, and Chris Bosh, may be looking to add a fourth all-star to the mix. Knicks forward Carmelo Anthony could be signed this summer, according to ESPN. There are obvious barriers in place: All four stars would have to opt out of their current contracts and take significant pay cuts. The NBA’s current collective bargaining agreement also poses problems. But it would take some pressure off James in offense and give Anthony his first real shot at a championship.