There's a lot of topics here on lose skin, and some really good info on plastic surgery somewhere that I think Meg posted.
In a nutshell, it depends. The younger you are, the better chance that your skin will be more elastic and able to snap back a bit more than an older person. But even that's not a guarantee. Massaging may help, a bit. Just use a lotion daily and massage the area. Exercise helps, quite a lot. But in the end, you may still have lose skin.
Losing 100+ pounds, at the age of 37 to 39, after pregnancy, while massaging constantly during weightloss and my latest pregnancy, and doing toning exercises constantly, I still have quite a lot of lose skin. Not so much that you can tell if I'm standing straight. If I bend forward in a 2 piece though, you're gonna lose your lunch. Or I will one.
But I wouldn't trade it for the fat skin at all. And I can't afford the surgery, and at my age, who's gonna notice anyway? LOL