They won't. As explained before, it's convention floor exclusive footage. Just like the other footage they've shown their, which is why these get leaked in the first place. The only reason we're seeing this is because someone has decided to uploaded online and screw the no recording policy! LOL
I don't even think the "Thor" or "Captain America" footage was included in their DVD releases ( maybe wrong about that). Still have yet to see the "Doctor Who" footage or "Iron Man 3" footage leak yet online. So they're tightening things down more and more.