I've been thinking... with the shots of the distinctly 'adhoc' looking X-Wing landing field and the pictures of Stormtrooper armour. It could suggest that JJ has gone with the "Rebels never actually defeated the Empire" interpretation of the OUT ending to ROTJ. Hell it would make a lot more sense than supposing that just by killing The Emperor, The Rebels magically made the Imperials all go away.

If this is the case. Two things could be concluded. One, that it explains the absolute need for the de-canonisation of all previous EU. Two, that it makes reaquainting the general public with a restored version of the OUT, without SE changes of vital importance.

Fingers crossed eh!