Current defensive coordinator of the San Diego Chargers
Ron Rivera was the defensive coordinator for the Bears in 2006. It was him, not Lovie, calling the shots for one of the more dominating defense the Bears had had in a long time.
Of course, Lovie and Rivera's opinions differed greatly when it came to defensive formations and after butting heads, Rivera was not retained.
Cons: Despite his great success in Chicago, the Chargers defense has not ranked in the top ten in total defense since Rivera took over. While their pass rush has been exceptional, they still give up yards and points. Plus, after the falling out with the Bears, you have to imagine Rivera would be hesitant to come back.
Pros: He is a former Bear himself, playing on the team for nine seasons, including the 1985 Super Bowl championship team. His defensive intensity is strong and you better believe that when he speaks, his team will listen. His defense has worked in the past and due to his history with the team, he would have a year or two grace period from many fans and media outlets while others would be expected to come in and show immediate results.
...Plus, he is not Lovie.
Do I want him as head coach? I would take him over Garrett just so we could have a true Bear leading us again, but there are definitley better candidates out there.
Likelihood he will be the head coach: No chance. He lacks the success of the past few seasons to earn him a head coaching position anywhere in the NFL right now. But I wouldn't mind him as D-Coordinator again.