It is unlikely the petition would be approved if your spouse does not appear for an interview. Typically, USCIS requires both spouses to appear for an interview. There are exceptions for active duty military personnel deployed overseas who cannot, but your fiancé is not a member of the military. Your spouse should make an effort to appear for the interview. If he cannot appear for the interview, he will need to clearly establish why this is not possible. You can request processing be expedited but USCIS rarely exepedite a processing unless there is a significant humanitarian issue. You can read more about the process at http://myattorneyusa.com/family-immigration. I encourage you to work with an attorney in this situation.
Answered on Apr 11th, 2016 at 5:20 AM