The big developments in the pipe for the next week or so are charges for Cohen and any counter move or preemptive move by Trump. Cohen has fired his lawyers indicating he will co-operate with prosecutors. This move could force Trump into offering a pardon. If he does this presents difficulties as the crimes would have to be detailed and Cohen would have to accept guilt and also waive his right to using the 5th. If he doesn't Pardon him then Muller gets another star witness.
Manafort's trial is also about a month away - again the same issue with Pardons apply. If Trump offers two Pardons on each of these and all the crimes are disclosed then he effectively confirms the criminal activity ongoing around his campaign and both Manafort and Cohen will have waived their right to pleading the 5th.
This leads on to Trumps own crimes and is the reason Trump floated the idea of being above the law / able to pardon himself. Muller is building a stock pile of co-operative witnesses, he already has a number who have flipped - the question is how many will testify to his crimes and how senior they are, the best it could get for Trump at this stage is 3/4 campaign staff testify against him and Cohen & Manafort don't but they don't having accepted pardons for similar crimes to Trump.
Pres Sec Sanders and her deputy are rumored to be considering quitting. Given the above is that any surprise. The Korea summit was a great distraction but that has run it's course now, expect some more fireworks to distract from the real story.