At this point I don't think any investigations into any DS party are real. Q is a psyop to scare/force the dems to bury themselves in the public eye, hence allowing Rs to take back control in house and get DJT re-elected. MAYBE, after that investigations begin. MAYBE if deals are made they won't. Trump wants to fix this country for sure, just needs to remove blockades and make sure this can't happen again. Arresting them all would backfire, especially now in the election cycle.
Barr is gray/black and and being forced back into AG role to scare the shit out of the dems etc. He had a cush job, why come back? MI (Q) forced him back to cover his ass.
Also, Trump does not know who Q is. Maybe has some limited communication but he does not know them (MI/NSA patriots probably). He is directed by them.
We will never know who they are.