I feel pretty positive that the station will be in between the train tracks with the lift hill probably going over the tracks possibly out towards the stable? I don't really know which part of the valley they are going to use yet. I kind of hope they keep most of the ride closer to the maintenance area and away from the train route, otherwise it will be like riding through a coaster canyon instead of out of the city and through the woods.
I can't really picture in my head any possible layouts, since we don't have any original works by RMC to look at, or even any extensive renovations like Texas Giant to compare to since this will use a different track system. RMC certainly used some daring track elements on Texas Giant, but it was meant to be a high thrill coaster and again it uses a more flexible track system. I'm thinking this coaster will be more along the lines of Thunderhead's level of intensity, but probably less compact and with overbanks, hills, and wild transitions instead of focusing on cross-overs and sweeping turns. I'm pretty sure after looking at TG that they respect airtime enough to work a good bit of that in as well, so that's something to look forward to.
In some ways I'm kind of glad they aren't going with GCII, because if they were we could probably make a pretty accurate prediction of the layout even now. GCII is fairly predictable, but at least they do have a high level of consistent quality.