Well being concerned doesn't really help.
It is not some thing negative as such. Just that because of recent marriage CIC often wants to confirm if it is a genuine profile.
If you are educated, have a genuine case and can talk fine in English and go with most evidence of your relationship and your profile, you should be good to go.
It is not a court hearing. Just an in person interaction to verify and know the applicant in person.
For US visit visas, EVERY ONE goes through an interview. For Canada interview is only called in far fewer cases. However, that does not mean interview results in refusal.
Like i said earlier, you should only be concerned if this was a marriage of convenience or something (please don't feel negative about it, i don't know you and the fact is a lot of people merely try paper marriages in exchange of large sums of money to get here).
If you have been married for longer, have kids or have provided a lot of supporting documentation, usually that is enough and doesn't call for an interview.
Lastly, please note that this is just my perceived likely reason for interview. The actual concerns would only be known to CIC. However, you shouldn't worry as long as you have a genuine case and brought proof for most stuff.