Four hours in the morning apparently isn’t enough. NBC’s “Today” show is going prime-time, for one night only.Matt Lauer, Meredith Vieira, Al Roker and Ann Curry will host a one-hour review on Dec. 22 of the year’s biggest news events. It won’t be strictly serious; the show will include big moments in pop culture and “Today” show bloopers. It’s the first time they’ve tried something like this in more than a decade. With its prime-time schedule suffering, NBC is reaching toward its more successful areas for programming. Late-night king Jay Leno is moving to prime-time next fall.