-- The WrestleMania roles for Dwayne Johnson, Steve Austin, Shawn Michaels and other names from the past have not been announced publicly despite the PPV being less than two weeks away. The role for Austin, Michaels and Mick Foley have reportedly been set in stone for a while now whereas the Rock - originally hyped to have a 'huge' role - has barely been mentioned on TV. The speculation is that WWE thought that at first they would need to both Austin and Rock heavily involved in some capacity to sell out WrestleMania but the show is pretty much sold out already even without mentioning them much.
-- John Cena, while not wrestling at WrestleMania, is expected to be involved in some capacity, even if it's just an appearance.
-- WWE has been telling overseas providers that WrestleMania will go past 11 p.m. ET and ending somewhere between 11:05 p.m and 11:20 p.m ET.
-- WWE will likely announce the audience at some number over 103,219 as that is what the Super Bowl announced in the same arena in 2011 and WWE always hypes a higher number in arenas where both events have been held.
Source: Wrestling Observer Newsletter. Subscription information & prices available at f4wonline.com