^ Completely agree.  I love Exterminator at Kennywood and it is one of my favorite coasters there. A wild mouse in the Crypt building would be fantastic.

Inside, in a big, high ceiling, dark building with lighting and minimal set dressing, a spinning “out of control nine cart” could be pretty cool though. I know a place that already has a tunnel- like entrance. 

I attended ERScream. I thought ACE put together a nice event and made the best of the way things turned out with the weather. 

For what it's worth, ACE held an event (ERScream!) at KI last October.  It seemed well-attended, but the weather was poor.  At dinner in the picnic grove, park manager Tony Carovillano announced the park would be closing early.  This was a bummer and meant no haunt attractions, but was understandable due to the weather.  Overall it was a good event with a slightly disappointing ending.   I was looking forward to KingsCon as a follow-up event, especially with the uncertainty about Coasterstock this year.  If they do have Coasterstock, I wonder what the price will be.    

Edit.