Tell us more about this...I can't recall any standout still left on that defense from last year - who am I forgetting?
Jourdan Lewis got some All American nods last year and is in the running for the Thorpe.
Jabrill Peppers is perhaps the most athletic defender in the country (USC's coach compared him in HS to Adrian Peterson as the best he's ever seen)
Ryan Glasgow was probably the best interior DL in the Big Ten last year
Chris Wormley is all conference caliber DL
Maurice Hurst is one of the best interior pass rushers in the country
Brian Mone was supposed to be the starting NT but missed the season with injury
Taco Charlton is a very good pass rusher at DE
Channing Stribling and Jeremy Clark are both really good CBs, especially as the #2 and #3 on the team
Dymonte Thomas is a former elite recruit at S with blazing speed that came on strong last season
In short, Michigan probably has the best DL in the country. They'd be elite even without adding back Brian Mone and #1 overall recruit Rashan Gary who probably won't even start. The secondary is also in the conversation for best in the country, though I'm less certain of that. LB is a bit of a question, but they've got some pretty good options and with such a dominant DL in front of them they will likely perform pretty well.
They return most of their playmakers (and add several more) to a defense that ranked #4 nationally in total D and #6 in scoring D. It'd be a surprise if they aren't better than last year.