Probably nothing will happen. If the Dems had the house, senate and WH after Trump1 and J6 and did nothing, I'm sure they won't do anything next time they have all three. Everyone will say 'bring the nation together, don't tear it apart' so the Dems will go back to normal and the Rs will go back to the manosphere and podcasts and Facebook and continue their trip to Putinism.
But so many things need to happen
pardon power restricted
gerrymandering restricted
an immigration compromise
figure out the emoluments clause
forbid the exec branch from refusing to spend money on what the congress has allocated to
ideally change SCOTUS to 18 year terms instead of serving for life
put on paper how much force the WH is allowed to wield without congress
and of course, congres needs to insist the power to tax and tariff is theirs and theirs alone.
try other ways to get money out of politics. That is whack a mole but have to keep fighting that fight.