Portland has long been rumored to be after star point guard Chris Paul. Now that the Paul rumors have died down, it is time to move on.
Even if Paul was available, it would be risky to send talented players like Nic Batum for him after his injury-ridden season last year.
A deal for Tony Parker has also been rumored, but I don't think he is much of an upgrade over Andre Miller, and he will probably leave for New York in free agency next year anyway.
Devin Harris has also been discussed, but he is a scorer and little else, not a great fit with Brandon Roy.
Portland should go after a younger point guard. Their second priority should be a backup 4/5. They are deep at the 2 spot, so that can be used in acquiring a player.
Here are a few options...