I know how shocking it would be to go to a summit without a deal mostly done before hand, but Trump is willing to give it a go.
Well, remember one of the most historic summits in history.
At the 1986 Iceland Summit, President Reagan by proposing to eliminate all Intermediate Range Nuclear Weapons, as well as eliminating all ballistic missiles within 10 years. This shocked and stunned the Soviet delegation, and the proposal was scraped by them.
In the last several decades, far to many people have come to expect that summits always result in agreements and treaties. And while many of them ultimately do (the 1986 Summit resulted in the INF treaty 2 years later). But most of the time when it comes to North Korea, nothing results.
In 2000 we had the first Summit between North and South Korea since the war. NK was actually paid $500 million to attend, and ultimately nothing happened, even though both pledged at the time to end the war.
Then it was repeated in 2007. This is pretty much just a repeat of the 2000 Summit, and nothing changed.
We then saw this repeated yet again in April 2018. Where once again, promises the war was over, nothing else changed.
So do I expect much from this one? No, not really.
But it is really impossible to go into this with a deal in hand for many reasons. For one, NK has a history of not making deals without a huge payout first. Then secondly, they also have this history of breaking pretty much every deal they have made in the past with the US.
And I do not give much faith in either a freeze to their nuclear or missile programs. Way back in 1994 North Korea and the US signed the "Agreed Framework". In exchange for money, fuel, and 2 nuclear plants. However, the US kept up their end of the bargain. Sending half a million tons of fuel oil to North Korea every year was happening, as per the agreement. But NK only shuttered their uranium enrichment sites. And by 1998 they were again enriching uranium at the plants.
By 2002 they pretty much admitted that they had been ignoring the 1994 treaty for years, and would continue to do so, as was their right as a "sovereign nation".
Myself, I no longer have any trust or faith in any treaties with North Korea. They seem to feel absolutely no need to agree to anything, and even if they do only for so long as it is convenient for them.