SPOILER-filled Details About IRON MAN 3 And THOR: THE DARK WORLD?

If a stuntman revealed something spoilerish about a Marvel movie that he’s a part of, does Marvel cry out “off with his head”!?
I’ve always had this silly theory that Christopher Nolan manages to keep the plot for his projects secret because he hires snipers to follow and track every cast and crew member of his production for whenever they open their big mouth. Ha!
One stuntman named Andrew Lawden chatted with Bombad Radio, via comicbookmovie, and may have said a bit too much about the detailed plot of IRON MAN 3 including Iron Man vs. the Mandarin big fight and also about THOR: THE DARK WORLD including a certain character’s death.
Take the following with grain of salt for now but heads up, you’ve been warned, SPOILER ALERT..

on IRON MAN 3

“Well, there’s going to be a big fight sequence with The Mandarin, who’s the main villain, which will involve none other than forty different iron man suits. There’s an amazing rescue where The Mandarin basically wants to bring down the American government and kill the President, and he launches an attack on Air Force One. All of them – the President and his men and staff – get sucked out of the plane, and Iron Man rescues them by forming this amazing human chain in the sky.
“There’s some pretty spectacular stuff that goes on. There’s an amazing sequence where he has this rooftop house that he builds to store all his Iron Man suits, and it gets attacked by The Mandarin and these gunships [...] I was shocked to discover there are like forty Iron Man suits written into this feature in various ways…so that’s going to be pretty impressive. But apparently he needs this Iron Man army to go up against The Mandarin’s forces.”

on THOR: THE DARK WORLD

“Thor becomes reunited with Jane who becomes possessed by a Dark Spirit, which is connected with the Dark Elves; a race the Asgardians have fallen out with many years beforehand [...] The Dark Elves attack Asgard, and they take a huge hit. So Thor has to rebuild Asgard by putting together an army to go and take the battle to the Dark Elves and defeat them. But the only way he can do this is – he needs to cross over to the Dark World, and the only person who has access to the dark side of Asgard is his old brother Loki, who at the beginning of the film is locked up in prison.
So what happens is Thor basically has to negotiate this truce with Loki, and he goes on this great trek with Jane, all three of them. They go to this far side of Asgard, which is being shot in Iceland, where they train and assemble an army to go and attack the Dark Elves’ world.
“But the exclusive twist…is that one of the things that happens during the Asgardian attack is that Thor’s mother gets killed. So it becomes like a vengeance thing. And they were keeping very tight-lipped about what actually happens with Loki, you don’t know whether he redeems himself or he’s still the bad egg.”

What do you think? Any truth to this or is it bull?