Looking back, it took a good 7 months spent under the 200 day before the back of the bulls was broken, and even then, there were a few spectacular rallies that gave them hope. I think we may see some of that..this will require LOTS of patience. Mots of the folks left, are either good at shorting or have a sell the rally attitude. They have to be retrained through pain. It has to get to the point where it is too painful to continue to do what has worked for so long.
I think bears have suffered almost nothing yet, so this will take a long time to unwind