What I personally think will happen is that the EU would go through a Ultimate Marvel process.
Luke will still meet and marry Mara Jade only she'll be written differently Leia and Han will still have 3 kids Jaden,Jaina and Anakin but they might have different personalities, it might not be Jaden who turns sith but Jaina etc...
I see this again what did the Thrawn series offer a play by play of the clone Wars which was chucked out?
You do have to accept that Lucas was at time still the author so he had the right to overwrite it.