I'm expecting the new film to be set a couple of decades after Return of the Jedi.
Makes little sense having Mark, Harrison, and Carrie back in the film if they're setting it right after ep6. Seems much more likely they'll be playing older folk as the new generation go off on adventures.
Going with the canon from the books, I reckon the main focus will either be on Han & Leia's kids or on Luke's academy - or maybe both, and will probably involve a gifted Jedi student going to the dark side.
Whatever the plot, though, you can pretty much guarantee a cubic f*cktonne of screenflare, with Abrams in charge.
Still, he makes a decent flick, so I'm looking forward to this
About bloody time they started work on the last films, they should have done that before fucking about with I to III.
Corrected for you.
Lucas always said it was supposed to be a 9 part story, split into three trilogies (there's speculation he only came up with that after the first film came out, but he's certainly been saying it since the 70s.
I believe Disney are planning on doing significantly more than three more films, though.
(In the books Han & Leia had three kids - the eldest two being twins (a boy and a girl), the youngest being a boy very strong in the force.
Also in the books, Luke set up a Jedi training academy on a remote planet.)
EDIT - Ah. I've just seen that Disney have said the film will be set 30 years after RotJ.