Prelude to a Rondo trade?
Not likely. The trade would probably worked out first with all the possible moving part in place. Anthony and his expiring contract could be useful.
HUH?!?!
If there was a pending deal in place for Rondo already, then it would make sense.
But if there is not deal, Anthony is a decent size small expiring contract that can be used as cap filler if needed. Bynum can't be used as that for I think 90 days.
Therefor, I don't see how this deal is connected to trading an injured Rondo. It looks more to me like a save money, get a better talent and (very important I think) add a veteran player at the position of a very young rookie to help him grow as a player.
Even when Rondo is back, you can see the two of them sitting next to each other with Bynum pointing out what Smart needs to see as a PG in the NBA.