The Avengers: Age of Ultron ****Now with Spoilers in living Technicolor***

Ok, so I'm trying to wrap my head around this trailer, I've watched a bunch of times now.

What it the reason (speculation) y'all think that Scarlet Witch and Quick Silver are fighting for Ultron?

And what are those claw like things at the 1:06 mark?

The Black Widow/Banner hookup is interesting.

So much stuff in there.