Chris Burke has a mock up at SI.com, FWIW. He mocks Johnson to the Ravens at #26, and notes:
http://www.si.com/nfl/2015/03/12/20...ston-marcus-mariota?page=2&devicetype=default
I don't have a strong favorite among the CBs right now, but I could see that appealing to BB. Jones has more upside, but may not be as ready, and I don't believe he is as much of a ST contributor. Johnson could start out in a rotation and as a STer, and move to a man role. He's a bit like Devin McCourty in some respects, but bigger and with better man coverage skills.
Again, I'm not picking favorites right now, but I could see the potential appeal to BB.
He also mocks DT Michael Bennett to the Pats at 32, noting:
I'm not a huge Bennett fan, but that reasoning is exactly why I want Marcus Hardison on day 2. Create more havoc on the interior DL with Hardison and Easley, both of whom have the ability to be effective all over the line.