The point guard, who missed all of last season while recovering from an anterior cruciate ligament rupture, was ruled out for the rest of this campaign after tearing his meniscus in November.
Forman told ESPN: "He's making great progress. When he had the injury, we were very lucky that the meniscus could be repaired.
"He'll come back and be 100%, there's no question in any of our minds. But because it was able to be repaired, he'll have great stability in that knee and it will take away the chances that it becomes arthritic towards the end of his career.
"Let's face it, he's still only 25. He's still got 10, 12, 15 years ahead in his career, so everything went as we wanted it to and he continues to make great progress. There's been no setbacks, and we see him returning at 100%."
Rose averaged 15.9 points per game during the 10 games that he was able to play in before sustaining the injury.