Linda:
Unfortunately, no one can give you a definitive answer as to exactly what will (or will not) happen after your surgery, not even the surgeon. All anyone can do is take an 'educated guess'. Here's mine:
The facial nerve can be preserved but that requires nerve monitoring and a very skilled surgical hand.
You may have some mild balance problems but if you do, they certainly would not be severe as your brain has already adapted to single-sided hearing input.
Last year, I had retrosigmoid surgery to 'de-bulk' (hollow out) the tumor followed by FSR treatments to kill the remaining tumor DNA. This approach avoids damage to the facial nerve yet effectively destroys the tumor. To date, my radiation oncologist and neurosurgeon (teamwork!) have claimed a 100% success rate following this two-tiered procedure. Two months after my final FSR treatment, a new MRI scan showed the beginning of necrosis in the remaining tumor. I'm pleased to report that I've experienced no facial paralysis or other complications since the surgery and radiation treatments.
Based on my experience...the only kind I have....I would recommend you look into this approach rather than trust another surgeon to 'get it all' with no facial/cranial nerve damage. That doesn't always work out so well. I wish you the best as you prepare for your second AN surgery.
Jim