Nope...It was some local crazy who could not take "no" for an answer. So he walked in the plant to kill the woman who worked there. Which is why all Ford buildings now have gates with badge access.
...And lets be honest, the plant was TOO big. If Ford shut down two other plants then a case could be made to open it again. Who knows, if the state had built the new interchnge years ago (like they were supposed to) Wixom might still be open.