I would think Scotty has the advantage with his fan base. A bit like when KP won, it really didn't matter a jot what she did in the house, her fan base was so much bigger that the result was never in doubt. One always hopes that John or Darren can do it, but I think it will be a struggle - A top 3 finish for either of them is not beyond the bounds of possibility though
Scotty has over 1 million twitter followers - Darren has 20k - he has no realistic chance of winning