Maybe Democrats will release information when they take over congress
There is no "maybe". For one, they will immediately release transcripts of Trump Jr's congessional testimony to the Mueller team -- something the republicans refused to do -- placing him in immediate legal jeopardy.
Good I hope they do
They will also be looking into the depth of corruption of the efforts of Nunes, the administration, and its lawyers to conspire to mislead the public and investigators and to try to block the investigation , which could be considered obstruction. Depending on the info made available by McGahn, and their ability to corroborate it, Nunes could be indicted and/or thrown out of congress.