I think the plan of this summit is in plain sight. Trump kept saying he wasn’t concerned about a fast result. He knew this summit was not to reach a deal. We knew NK was concealing nuclear sites and this summit was to tell them we know. Trump said as much. When NK was not willing to give up those sites on the spot, the summit ended and NK will need to reassess its’s position.
Contrary to the silly Fox commentators drooling over the great “body language” etc, it was obvious something was happening behind the scenes. Trump was calm and in control, Kim looked wary. The president stated we confronted them about their secret sites. We did not expect a deal this time. As usual, the media is too mechanical to listen to what is being said.
I believe that your post is correct.