http://www.techradar.com/news/mac-mini-2018-release-date-news-and-rumors

It’s been almost four years since we last saw a major update to the Mac mini, but there's hope that we could indeed see a new Mac mini in 2018.

While we don’t have any official indication of when – or even if – a Mac mini 2018 is coming from Apple, based on the rumors we’ve heard – and what we can learn from previous Mac mini releases – we can speculate on the release date, price and features of the new Mac mini.