I got Baseball America's Handbook today. If you don't have one and love minor league baseball you should really buy a copy of it.
In Neftali Soto's writeup it says that the Reds tried him out at catcher in the Instructional League and he was receptive to the move and picked up on things quickly. Its not known if its something that will happen, and I know that it has been mentioned before by JJ Cooper that he thought it could be something to look into. Still, I think this could be a very interesting and potentially very smart move. Soto has the arm to play back there and his bat could profile quite well back there too where his approach wouldn't be as detrimental if he never brings the walks up.