The future of Six Flags may be up in the air.

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"Six Flags critic studies options

Washington Redskins owner Dan Snyder is taking another look at his investment in Oklahoma City-based Six Flags Inc., according to securities filings.
Snyder, who owns 8.76 percent of Six Flags stock through his Red Zone LLC investment fund, said in a filing late Friday he may join other investors to buy the company, force a merger or sell park assets.

He also may sell his stake in the company or buy additional shares.

Six Flags spokeswoman Debbie Nauser said the company had no comment.

The board updated Six Flags' bylaws in September to strengthen a so- called "poison pill" provision that would dilute the stake of a single investor whose holdings reach 15 percent.

Snyder, an outspoken critic of Six Flags' management, had said in a January letter to Six Flags' board that he would no longer invest in the company.

Six Flags shares rose 4 cents to close at $4.17 on the New York Stock Exchange. "