Delayed underbite surgery. Will I be looking worse?

I have underbite and crowded upper teeth...I have been suggested to get started with braces and 10-12 months down the line, orthodontist will decide whether I am a surgical case or not. As far as I can see, I may not want to go for surgery 12 months down due to some commitments and will have to delay the surgery for another 12 months. So I am ok to go for surgery 24 months down. Now my Q is: Will I be looking much worse (than what I look today) during those 12 months when the surgery is delayed?