The DOJ IG report will confirm this corruption. Nunes is putting pressure on the IG to release the report sooner rather than later by leaking that his committee will write their own report on FBI corruption.
My bet is that the Nunes report will be more damning than the DOJ’s internal OIG report, proving that the DOJ can’t be trusted to investigate itself. That would hopefully then lead to a special counsel with prosecutory powers to investigate the DOJ, or Sessions firing if he refused to appoint it.