This is my core treatment for you.
Acupuncture (2x a week) for regeneration of your body as a whole, bones, and ankle injuries combined with...
Powerlifting training (for 6 months minimum) (continuous) to increase bone density to lift your large frame. Did you read this Yao Ming?
Meditation techniques will be supplementary.
If you can follow this program, you can easily come out of retirement for next season. If you don't believe me, why don't you ask Jason Kidd who finally has his first Championship (2011).