A case design purported to be associated with the upcoming iPad Mini 5 appeared to show that the tablet would have a dual camera and a headphone jack. This may have been an encouraging sign, as the iPad Mini line hasn't been upgraded since 2015. However, a subsequent comment on the matter from another leaker asserts that the case in the initial leak is in fact from 2016.
https://www.notebookcheck.net/iPad-Mini-5-case-leak-may-in-fact-be-2016-prototype.387356.0.html