It will be interesting to see if any other teams show strong interest.
I have to think they would, there are few impact pass rushers in the league and Dallas absorbed the bulk of the PR damage already. If Hardy went to team that wasn't in a major media market the media spotlight would be a lot less.
My quess on the contract would be the 4 years/ 20MM guaranteed like I said, with a breakout like this -
10 Million Signing Bonus
2.5 Million Guaranteed Salary for 4 years
Roster bonus of 4 Million each in years 2 - 4
Pro Bowl and Performance Incentives of 5 Million each year in years 2 - 4
Voidable 5th year to stretch the cap hit.
That limits the downside to Dallas to 20MM but give Hardy a shot at 12 Million per season.