Ok firstly, Terry Richardson's announcement will take place this Thursday at 11:45 in the Cass Tech weight room. The finalists for Terry are Michigan, USC, Alabama, Notre Dame and LSU - that's a strong top five, which could make it all the sweeter if Michigan gets him.
I can't say I know for certain where he's going, but I'd be very surprised if he decided to spurn the opportunity to play with all his friends at Michigan. This will be a great pickup for the Wolverines, as at the start of the year I thought it was very unlikely that UM landed the Detroit trio. But here we are, in Mid May with possibly 12 high quality commits by Thursday.
In other news, I believe QB Gunner Kiel has announced a final four of Missouri, Michigan, Oklahoma and Alabama (Source: @DGdestroys - you can follow him on Twitter here). There's also a rumor that he might be visiting Michigan this week, so look out for that if it happens. So it does seem like Michigan has a pretty good shot here, although I'm doubtful that we lead right now.
EDIT: Sorry, I originally put ND in Kiel's final four by accident, whereas it should have been Alabama. Now changed.