It appears he is going to throw the sink at them.
David Axelrod on CNN: "It's going to be an unalloyed carpet bombing."
From transcript of Trump speech:
I am going to give a major speech on probably Monday of next week, and we are going to be discussing all of the things that have taken place with the Clintons. I think you are going to find it very informative and very, very interesting. I wonder if the press will want to attend...They've made hundreds of millions of dollars selling access, selling favors, selling government contracts. It's a sad day in America when foreign governments with deep pockets have more influence in our own country than our great citizens.