Looks like last week's news of imminent indictments from Durham was indeed a head fake.
Zeroing in on Clapper and Brennan could be one as well. If he's zeroing in on Clapper and Brennan, that implies he's NOT zeroing in on Comey, who seems like the easiest target of the three. Unless he's already got a sealed indictment against Comey, which I doubt.
The key news to focus on is the expansion of the team. At this point Mueller was CUTTING his team cause there was nothing to investigate.
Durham has done the opposite: He's found so much to look into that it's overloaded his current staff, and he's having to bring in additional help.
Keep watching...