Jason Ward at Making Star Wars weighs in with some fresh rumors on a possible place IX will go for location shooting. Jordan was a possibility for Jakku in The Force Awakens, and was used in Rogue One for Jedha. Could a revisit to one of those places be in order?
Jakku may be more slightly more likely due to it being Rey’s homeworld, but Jedha has appeared in some of the post-ANH comics, so it’s not out of the question. Or, the country could be used for something entirely new.
Jason also mentions something present in early versions of The Force Awakens that didn’t make the final cut and could be potential IX spoilers if filmed/reused, so be warned.
In any case, with filming due to begin Wednesday, we may at least get part of an answer soon.