My dream ride would be a Mack multi-launch through the woods, with tight ground hugging elements. I understand the likelihood of that happening is quite low.
My more realistic idea would be to turn The Crypt/Tomb Raider building into a dark Wild-Mouse ride. Think Kennywood's 'Exterminator' or Hershey's 'Laff Trakk'.
Pros-
It would be a fairly cheap investment.
They can add another roller coaster to the count.
It would be another 48' ride, which is always good for families.
KI doesn't have anything like it and is need of another dark or indoor ride.
The theme could be whatever they wanted or needed (kid friendly, scary, river-town, etc.)
Cons-
They are not the best at getting people through the line.
It doesn't excite the giga crowd.
I know I'd be excited about it. I haven't ridden enough Wild Mice to give a manufacturer preference. Honestly it would probably come down to whoever has a model that could fit into the building. What do you think?