Look at Kings Island: Banshee, Bat, and Invertigo all in the Action Zone with a Vekoma junior invert a stone's throw away. And then over at Dorney Park, Stinger and Possessed are practically interlocking, with Talon within spitting distance. And your point being what now?
It was a question on others' thoughts, not necessarily a point.
But if I had to make one, it's usually better to have a park's best coasters far from the entrance to attract people deeper into the park.
The front of the park is generally not where you want your guests hanging out. It makes it too easy for them to leave and get lunch from their cars, etc. They spend less money. My 'point', I guess, is that while a coaster over the entrance would rock, Valleyfair does need a real anchor in the back. I also went on to say that if they put an invert over the entrance and are planning something even bigger at the back (which is likely, they are of course the pro's) that would be perfect and I'm concerned for nothing.