Assange did say there will be a release this week, and others before the election. Nothing about the subject of the material to be released.
This was a 10th Wikileaks anniversary press conference. Coverage I scanned at youtube said that Assange himself had not promised anything for today, that all the anticipation and speculation had created huge expectations. But he’s probably hurt his credibility until he produces something else of significance.
Alas, on August 26, 2016 Assange told Fox and Friends that he would be releasing info on Hillary “the following week.” Never happened. That was six weeks ago. I would not give him the time of day