Re: Guy Pearce is Aldrich Killian
Killian was only a minor character in the Extremis story arc. I'm sure they're changing Ellis' story considerably, and Pearce will expand Killian's role.
Plus, I'd be willing to bet the "terrorists" that Killian sells the technology to aren't homegrown militia like in the original story, but will instead be The Ten Rings, and that's where we'll see Kingsley as Mandarin.
THE COTTON AVENGERS
...They move like slick cotton on oil.