Rosholt is obviously a great wrestler (everyone knows this), but his stand up looked very unimpressive in his fight with Osterneck and so did his stamina. Rosholt imo can eventually be a great mma fighter, but he needs to work a lot more on his all around game (like how Koscheck has). As of right now though I feel the only way Rosholt can win this fight is by decision via mostly lay and pray, and even that will be difficult because Miller can definitely pull a sub from his back. But with that being said we have seen plenty of fights where you think that the guy with good or great submission skills can sub a wrestler inside a wrestlers guard and the wrestler just ends up being too strong and keeps the other guy from being able to do anything. (example:Efrain vs. Nover) If Miller wins this fight it will be an exciting fight, but if Rosholt wins it most likely will be more boring via Rosholt basically just holding Miller down. If Rosholt is smart he won't stand with Miller, it didn't work so well for him in the Osterneck fight.
Forgot to give props to the Miller brothers, they are badass dudes, who doesn't like those guys.