The Toonami Infolink Website is reporting that two new anime series, MAR and Prince of Tennis, will make their U.S. broadcast debuts on the Cartoon Network's Toonami block on Saturday, December 23rd with initial episodes of  Prince of Tennis at 10 pm (ET, PT) and MAR at 10:30 pm (ET, PT).  Both series are from Viz Media, which also publishes the Prince of Tennis and MAR manga series.

Viz Media and the Cartoon Network have previously collaborated to offer the initial episodes of both Prince of Tennis and MAR over the Internet via Toonami's Jetstream service (see 'Viz and Cartoon Network Stream Together').