No one's expecting him to give specific details but he used to be an expert at hyping things up without really saying anything.
Spoilers Russell T. Davies Returns to Doctor Who as New Showrunner
How does one "hype" an episode that won't air for seven months and hasn't even started filming yet? (And may not until the fall?)
You put “Introducing [THE MOST FAMOUS ACTOR OF ALL TIME] as THE DOCTOR” in the biggest letters that will fit on the screen.
True, true. It's not like he hyped up the 60th Anniversary episodes EIGHTEEN MONTHS in advance or anything.
"We start shooting in a few months, it's going to be amazing." So difficult!
Tom Cruise IS the Doctor (well he'd be good at the running parts)
Hi Tom, some of the previous actors have found the running and the physical stuff a bit demanding, do you think you’ll be okay with it?
Tom stares, shakes head as seen in Oblivion gif: What?
"...and I'm the first openly Scottish host." 
lol maybe tom cruise did play the doctor on some of the alternate earths in the multiverse
"Millions of you watched me on Sex Education. About twelve of you watched me on Doctor Who."
