I doubt we pick up Abraham. Not just because he is too expensive and he's a malcontent, but we dont really have a place for him.
Sure, Abraham can technically play 3-4 OLB... But the nature of Saban's defense involves the ability to line up with the same personnel in multiple formations. Abraham does not have the all-around skill to be a regular linebacker in the 4-3, and the like.
I think it's much more likely the Dolphins will pick up a linebacker with pass rushing skills. Someone who has good enough pursuit and coverage skills to play consistantly in the 2-point stance.
Personally, I really like the concept of getting Julian Peterson. He's perfect for the role we want. In fact, he's played for Saban before at Michigan State. We could replace Donnie Spragan in the 3-4 and 4-3, and possibly use Peterson as a Robert Mathis type pass rushing specialist in Nickel and Dime packages and replace David Bowens.