I don't think anyone, at least not me, is asking for a movie adapted from the books to the screen, just that the events within those books aren't discarded for the new stories they will be telling.
Question:
ALL the books? Or just some of the books?
I mean, at this point, the books include stuff that happened before the OT (e.g. the two Han Solo trilogies), during the OT (e.g. Splinter of the Mind's Eye, Shadows of Empire, etc.), and a TON of stuff that came after the OT (e.g. the Dark Empire comics, the Zahn trilogy, the Vong books, the stuff AFTER the Vong books, etc.). The post-OT stuff stretches beyond how far we are from the release of ANH. In other words, it looks like the post-OT books stretch some 41 years after the battle of Yavin (which we'll say happened in 1977). That's five years from now.
And that doesn't even get into some of the comics which stretch some hundred plus years into the future after Yavin.
I don't really see a way they CAN make new movies that won't tread on the toes of at least SOME of that material, which puts us into a scenario of deciding what stays and what goes. In fact, I could EASILY see the entirety of anything from 5 ABY and on being eliminated by simply doing only a few things:
1.) Set the story 30 years ABY.
2.) Make Luke Skywalker single.
3.) Do not reference Mara Jade.
If you set the films during that time period and Luke's still a bachelor, or he's married to anyone OTHER than Mara and it's anything like 20+ years after Yavin....and pretty much the entire +5 ABY chronology starts to fall apart. Or at least large chunks of it do.
Personally....I'd expect them to kill that stuff. I wouldn't hold your breath that they'll keep it, simply because it's too much of a pain in the ass to manage the continuity. Plus, because the EU stuff has ALWAYS been treated as "fine unless/until we kill it in the films," there's no reason to try to maintain it. Unlike with Star Trek, where you had a wealth of films and TV shows to manage, you won't even get some "universal-reset-button" moment.