Here comes a "when's the best time to go" question.
I'm looking at the last week of Aug, weekends in Sept or it looks like their open on Friday's in Oct (I would be going during the day to avoid the Haunt crowds).
I'm guessing that the long brake run is due to the fact that they're running 3 trains without a mid-course. It probably costs as two blocks in the computer.
EDIT: Looks like a couple of people beat me to it.
I agree that Leviathan is pretty much the cats meow with regards to coaster names. Especially when used at the same park as Behemoth. Ziz would have to be a no-brainer for a flyer in the future.
I'm betting that a new ride will be added to the area where Festhaus was. A permanent Festhaus near the current location would also make sense. They have plenty of room just to the north of it's current location.