AS PER CANADA GOVERNMENT RULES REGARDING PR APPLICATION STAGES
If all of the sponsorship requirements are met, we will
* process your spouse's or common‑law partner's application
* send your spouse or common‑law partner a letter stating whether he or she has been approved or whether more information is required
* conduct medical, security and background checks
* contact your spouse or common‑law partner for a permanent residence interview, at which time the final decision on permanent resident status will be made.
So buddy there to 50 to 50% chances of interview or it can be waived off too. Any ways if CHC has to conduct interview you will be intimated around 15-30 days advance, so keep on checking.
Wish u all the best in this waiting game.