WWE.com has an interview with Rey Mysterio at this link, who discussed his injury, rehab, and the company's tour of Mexico. Mysterio noted that he didn't have surgery this time, and used stem cell treatment for his injury.
Mysterio also confirmed that he will be appearing during WWE's tour of Mexico this week, but will likely not be wrestling.
"With this new procedure, it's been floating around in the air," Mysterio said, when asked when he would return to action. "There's not that much time left before the end of the year. I'm hoping that either Thanksgiving comes a little early or Christmas comes a little early."
Mysterio said that he might "try" to get physically involved during the tour. As for retirement, Mysterio said that he hasn't given it any thought, and while it's something "that'll be down the road," he has no plans to retire in the next two to three years.