I had what you will probably end up having. My first surgery was a huge success. I didn't listen to my doctors is why i've ended up in the shape i'm in. I had a decompression (removal of the discs) and a fusion from l4-s1 with bak cages. I wish you the best of luck. Btw when they remove the disc you no longer have a pinched nerve, the disc is causing the problem. You may also have a laminectomy, I did, which opens up the area where your nerve exits. Good luck
another thing I thought of is by your wording it seems that the neurosurgeon isn't the doctor that is actually doing the procedure. If that is the case find a spine specialist, either a orthopaedic or neuro surgeon to do the procedure, not just anybody can operate on your spine successfully. Another procedure that may be an option is a discectomy, where they trim the herniation away but leave the remainder of the disc in place, this way you won't have to have a fusion. Whatever you do, research, ask questions, and make sure your surgeon is a spine specialist.