I think it will be someone that we aren't necessarily in good/great position with as of now. In other words, I think there is a good possibility it may be someone that has no interest in us as of now or someone that will completely be a surprise (like a Bryce Brown).
There are many to name, IMO: Ray Drew (although highly unlikely), Tuitt, Mickey Johnson, Therezie, Pagan. Obivously I think it will be on the defensive side of the ball because our needs on offense are being addressed pretty well and they are known. Offensively though, you have to go with Arnett.