The Score in Canada is advertising a three-hour block of WWE material preceding WrestleMania on April 1st:

4 PM (ET) - Once In A Lifetime-Rock/Cena Special
5 PM (ET) - WWE Vintage Collection
6 PM (ET) - The WWE Experience

Reporter's Link:
100% LINK (6 *SIX* NEW PHOTOS): Early Pics Of The WrestleMania 28 Set LEAKED!!!