I could see an EU reboot seriously pissing off a lot of fans. Lucasfilm always said the books were canon, even if they were a lower level of canon. There've been serious shakeups to the continuity, but Lucasfilm has always been able to retcon it away.

If Chewie being in the movie is that damned important to everyone, the only way I see it working is by setting the movie (hell, the whole ST) prior to the events of the NJO. They could probably pull it off, with the help of some digital de-aging on the big three.

What I would much rather prefer they do is simply set the movie whenever they are now in the books.