I discovered last night that one of my friends is working on this (she works as a prop/set painter) and I got to see photos of some of the items she's worked on - ranging from plates used in a fight scene through to Taskmaster's shield
I am so glad to see Black Widow will continue to fight crime in the afterlife, or however they will handle it! I think Scarlett Johansen is wonderful in the role, so I will be there when this is released.
My understanding is that the blonde in the poster is Yelena Belova, who in the comics became the second Black Widow. So this could be a way of passing the torch to the new character who will appear in future phases.