Just a quick clarification....
SFMM is not up for sale due to lack of customers or revenue. I just came from SFMM over the weekend and believe me there are plenty of guests in the park. SF's CEO has also maintained the SFMM is indeed very profitable.
The real problem is that Six Flags (the parent company) is in debt as shares have been falling due to customers moving away from the Six Flags brand (as a whole). To remedy this they looked at each of their parks to determine which parks would fetch the highest value on the market. SFMM being on valuable SoCal land happened to be one of them.
SF (the parent company) also has stated that they would to reinvent the Six Flags brand name to once again cater to the family setting. SFMM with all of its thrill rides really has become a "teenagers" or "Gen-X" park and SF (the parent company) maintains that they no longer want to deal with frustrations of a Gen-X park.
Going from here SF (the parent company) is exploring all offers on SFMM and I believe 3-5 other parks. There has been some talk of the SF's desired number for SFMM to be between $300-500M and some of the estimates that I have seen is that the land alone is worth $200-250M. Will it close soon?... probably not. Will it close?... if the money is right, its a possibility.
That being said, again, I just got back from there on Saturday. The rides are great (especially Tatsu and X - although Tatsu did break SEVERAL times during the day)! Sure, there were plenty of things that I would have improved on but I am sure if you put anything under the microscope you are going to find something. I particularly did not have a problem with the younger crowd and do think that the logistics of running a younger crowd park is is manageable.
Here's a link to one of the million articles on this sale...
http://www.sltrib.com/business/ci_4057143
Hope this clears up any misinformation...