Obviously you haven't seen any of the Santa Clause or other "family" movies he's done. Tim Allen is a huge "Michigan" fan, promoting the state in many ways (specifically, references to Michigan in his movies and other shows.) His voice will be recognizable.
Regardless, I've said for years they really need to do more advertising for the area in and around Muskegon. BTW, the latest issue of AARP has a huge back cover ad for Michigan's Adventure, which really surprised the heck out of me. I've seen MiA ads in AAA material we've received and in the local papers.
Considering the crapper the Michigan economy is in, people are cutting costs on vacations and staying much closer to home. Obviously the Detroit area is closer to Cedar Point, but if a family wants to cut costs, it will become obvious there are a lot of lower cost options an additional hour away.