True, but keep in mind that station needs can drive facilities. Michigan Central would have both commuter and intercity functions, and you'll have to design a station where the two users don't get in each other's way; in addition, if you want VIA to be extended across the Detroit River, you'll need a dedicated international area with passport control.
Come to think of it, asking Ford to provide modern station facilities for commuter, Amtrak, and Via services to terminate there, shouldn't be too much of an ask, since it would mostly be space assignation in areas that Ford is intending to keep public anyway. The Via facilities would be the most difficult, though.
Edit: Something else that needs to happen? Agitation for better intercity service
to Detroit. I'm thinking of a
Midwest HSR-type organization, except Detroit-centric and not necessarily high-speed. A citizen's group willing to do the outreach and legwork that neither the city, nor state, nor Amtrak are willing to do. Basically, you'd be wanting them to advocate for Wolverine-style service from Detroit to Cleveland, Columbus, Cincinnati, Indianapolis, Lansing and Grand Rapids, and somewhere near the top of the mitten, as well as extending VIA service through Windsor to Detroit.