There's definitely room for 2.
The likelihood is that 4 locks and 6 backrowers will be selected. Even discounting his ability to play 6, Jones has been the form lock of the Aussie conference. He's behind Simmons and Skelton, yes, but with Carters injury and the poor form of Horwill, it's hard to see him not making it.
For the backrowers, the consensus is that Pocock, Hooper, Fardy, McCalman and Palu are going. You'll pick another 6/8 option rather than another openside. With Potgièter Mafi, and Thompson being international players, that leaves Schatz, Higgers, McMahon and Cotrell as the regulars playing in those positions and the choice there is obviously Higgers. Theoretically you could select Dennis instead, but with McCalman and Jones already there, why would you go for what's approximately more of the same?
EDIT: Forgot Vaea, but he's a bit of the same situation as guys like Timani, Arnold and Coleman. A but raw to be thrown into it, and does he have the 80 minute tank? Do any of them?