Jim here. Got a great behind the scenes look at Cameron directing Worthington in what looks to be one of their transporter ships. Personally I love seeing these shots - I like seeing where scenes come from on a human creative level and this helps bring it home for me.I would bet that this scene takes place immediately before Jake rolls out on Pandora for the first time in his wheelchair (as seen in the teaser trailer). If you have a look at what Jake is holding - it is his breathing mask that he wears when in the atmosphere of Pandora.
The photo is from Empire who will have more shots in the upcoming issues.