skin sagging

I am a former D1 college wrestler (heavyweight). I've been big all my life, and wrestling/football kept my weight under control. I wrestled at 285 in college and now I weigh 475. While I once blame the immobilization of my two herniated discs in my lower back and the meds administered afterward for my weight increase (common med steroids) ,I think we all know that terrible eating and drinking habits are the true culprits to my excessive weight gain over 2.5 years.

Im 6 ft 5 in, and how on God's earth can I go through the sleeve operation without having the extreme drooping and sagging of my skin after losing the weight so quickly?? I hope to schedule my surgery before Christmas '14, but I feel I need to get a gym membership to lift and run asap to start the process now. What are tips and workouts to follow before, during, and after my procedure to keep from having skin removal surgery? I am open to any and everything! I am getting married to the love of my life on 6-4-16, and I want to look as amazing (265) and fit as I did when Liz first met me. I also want to increase muscle mass along with the weight loss. Again, any advice is welcome.

Thank you for your help,

-Adam