I'm of the opinion that Jeff Boschee has a greater than 50% chance of this being his, with Paul Sather being the other main option. I would actually be somewhat surprised if it wasn't one of those two.
I admittedly don't follow basketball that closely all the time, and don't have any inside information, but this is the feeling that I get. I think there are a couple mid-major assistants out there that we don't know about that could be darkhorses, but those two just seem to be where my mind keeps coming back to.