I think his only legitimate chance to return hinges on how Wallace progresses the next two months. As much as I'd like to see Lee moved, I don't see it happening. If they could pull of that miracle, I think his chances improve. Personally, I think he ends up a Ranger. I'm not real sure how I feel about that right now and I really don't want to consider it unless I absolutely must deal with such an outcome.
As for Berkman, I will not be surprised if he bounces back next year mostly due to the health of his knee. I know we all think "scoped knee? sure, he'll be back in 2mo." But normal people, people I know, who had scoped knees told me to avoid it until I absolutely MUST have it (arthritic left knee, with meniscus damage). Of the folks I talked to, one said his knee never felt good again. The other two said it took 6 months of dedicated re-hab. All were highschool athletes who had it done in their late 20's. I don't remember how much re-hab Berkman put in but I can imagine his right knee might be a huge factor in his performance from the right side.