Fox announced some changes Wednesday to its scheduled rollout of new and returning programs. The network said season seven of “MasterChef Junior” will now launch with a two-hour premiere on Tuesday, March 12, to be followed a week later, on Tuesday, March 19, by the series premiere of “Mental Samurai.”

Described by Fox as “the first-ever obstacle course for the mind,” the Rob Lowe-hosted “Mental Samurai” will premiere following an all-new episode of “MasterChef Junior.”

Lowe also produces “Mental Samurai.”

Here’s a teaser for “Mental Samurai” posted by Fox, which still has the previous premiere date …