Russell is most likely going to start next year, and Dak will see time as well, so I can see why Favre would want to transfer. However, if he does, we could be screwed at QB. Plenty of schools have had two QBs injured in a season before. ( see Florida this year)
Mini-Favre won't transfer to Southern; they have several young QBs they seem to be high on. I think he would head to ULL or MGCCC.