There were only ever two possible outcomes for a sequel trilogy.
Either Lucasfilm was going to figure out a way to set it within the continuity of the EU (in which case Chewie would be long dead and the ending would neccessarily allow for the Legacy comics to still happen a hundred years later), or they were going to completely start over per George’s wishes.
I never understood why people thought something like a Thrawn Trilogy adaptation was a possibility for the ST. The mere fact that the story would be spoiled already was reason enough for it to stay off the table as an option.
I think straight to DVD cartoon adaptations of EU material a la DC Comics animated movies would be a good idea (especially if they could get Hamill to at least voice Luke), but the idea of them ever doing a live action EU-based movie was always silly to me. Even when I was a little kid I knew that there was no chance of an eventual live action sequel movie being based on the book canon. I hardly ever read SW books but I knew from a friend who’d read quite a few that the canonicity was ridiculous.