Here's the early news for Season 14:
First, all three judges, plus Ryan, will be back.
The "you can come back unless you were in the Top 10 or on Tour" rule they introduced in Season 12 is back as well, which means the first three finalists eliminated last season - Kristen O'Connor, Emily Piriz, and Ben Briley - can return if they want (unless, for whatever reason, they sing at any of the Tour shows, or have made any sort of recording deal).
One significant change that almost certainly won't be mentioned on the air; the "first round" auditions will be one day in each city, instead of having to register on one day and then return one or two days later to sing. While this makes it easier on some people, as they don't have to find somewhere to stay in the city or make multiple trips, there is now an increased chance of somebody registering but being turned away without singing because they ran out of time (although there is a rule that says they can take people "out of line" to audition if they run late).