The three hostages in question were detained by North Korea between 2015 and 2017
Well, reports are saying the "hostages" have been moved to a hotel in Pyongyang last month where they are believed to be "going on tours, receiving medical treatment and eating good food".
Trump is somewhat using his proposed meeting with Kim Jong Un as a bargaining chip in this scenario, with John Bolton previously commenting that the release of the hostages would "an opportunity for North Korea to demonstrate their authenticity" in the run-up to the summit between Trump and Kim.
It's been quite a change to the geopolitical landscape if you think about it. Last year we had ICBM missiles flying across the ocean, and now we're discussing about peace talks and political compromise.