There are some hills in the area. If it drops down the ravine where Le Scoot and Alpie are it could be a considerable drop. Imagine the coaster interacting with those two rides.
There isn't really much to work with back there actually that isn't already taken up by Alpengeist or the Log Flume. Alpengeist pretty much goes all the way back to the Festhaus loading area, and there's the service road between Alepngeist and DarKastle which is needed not only as a service road, but for emergency vehicles. Other than that, you're mostly looking at flat ground. Between the train and the log flume there isn't much room, and it's mostly flat. There are small hills, but nothing that would allow for a big trench drop down like you have in the old BBW site pre-Verbolten (since they leveled a lot of that out for the Verbolten show room) or LNM. On the other side of the train is also flat, and is actually a very small area between the train and the service road. Any ride crossing the tracks there is very unlikely, and a wooden coaster would shock me even more because of the size of their support structure vs. the clearance needed for the train (leaving very little space left over til the service road).
As to interaction, while not impossible, there isn't much space left around Alpengeist in that area that new construction wouldn't violate a reach envelope for either ride. What little space there is between Alpie and the flume is used by yet another service road for the water main return servicing for the flume. The flume is a pretty tricky animal because there's lots of pavement and piping going on back there. Not impossible, but rather impractical. I'm not opposed to ride interaction, I just don't see it as super likely (I still say they missed an opportunity to wrap Tempesto around AC... only half joking hah)
If they wanted to be really funky and creative, it could go over pathways in France and into that little grassy area behind the Royal Palace Theater, but that would involve going over some large eating areas, paved areas, Trappers, the employee park entrance, the train, caribou station, and multiple shops. That's unlikely.
As I see it, there's really only three major options worth entertaining on the current information:
1) This is a family coasters.
2) This is not a coaster
3) This is smoke and mirrors and if there is a major ride coming, it's going somewhere else.
I'm going with 3. It makes no sense to hype a family coaster this early.