Byron0022,
I think the likelihood of returning to duty will depend on a number of factors. The hardest to know and the most important factor is how you will be able to function after your recovery. If you are able to function without significant limitation, then I would think your chances for a fit finding are good. Your doctor's support is important and your commander's input as to your functional ability to perform Soldier tasks and MOS skills will be very important, too. Your MOS and your grade will impact the PEB's views on your case. If you are combat arms and more junior in rank, then you may have an issue. On the other hand, if you are in a more sedentary MOS and are more senior, then your chances for a fit finding will probably increase.
If you are looking for a fit finding, you want to try to demonstrate that you can perform well. Passing an APFT (especially if taken with standard events and with a high score, of course taken with your doctors approval and within limits of your profile), having good NCOERs/OERs, being awarded medals/commendations in the period after your recovery, participation in field exercises, etc. will all help you to get a fit finding.
I hope all goes well for you. Best of luck!