I mentioned this idea a few months ago I think. Al is almost the perfect triangle center. He plays both ways, low post threat, mid range threat, 3pt threat, rim protector, PnR defender, and can get you a steal. Plus, he is a leader. My issue is that he does not rebound as well as he used to and he is about to be 30.. However, say AA opts out and you can trade Lopez for a pick without bringing back salary. It opens up the door to still go after Batum. You would set yourself up to have a versatile team with so many playmakers you want need a big time pg.
To get Teague you would have to unload Calderon with Lopez.