Here ya go, DPR. This is the closest play I could find. It's basically the same as what the rule addressed.
From the NBA Case Book.
Play
348. Following a regular or 20-second timeout,Team A exercises its option and moves the ball to the 28’ hash mark. On the throw-in Player A1 passes the ball to Player A2 who is positioned in the backcourt. What is the ruling?
During the last two minutes of the fourth period and/or overtime, any throw-in may be passed anywhere on the playing court. Frontcourt/backcourt status is established when a player with the ball secures a positive position on the court.
Since Wade doesn't have the ball until he's airborne and he then lands in the BC, he now has established his position. Legal play.