CNBC's Jim Cramer on Monday reviewed Six Flags' prospects, saying the amusement park giant might be able to improve business eventually if it works with its activist investor."While Six Flags' new management should be able to turn things around with some help from Jana Partners and Travis Kelce, I wouldn't stick your neck out in this one unless you're willing to be incredibly patient, because it's going to take a while," he said. "And there's always the chance that the company itself can't make it if the we ...