In Trump-Kim Singapore summit on June 12, 2018, we may not see a big breakthrough, like end of Korean war, although it may happen in later date at different location; since President Trump might have chosen a gradual and step-by-step approach. (Source: JTBC)

So, the summit may be just reiteration of their previous agreements and photo-ups, although may still produce positive result (but, not much).

Aloha.