Think there should be serious consequences, regardless of the direction the report takes, be it for Trump (if guilty, in the form of impeachment, etc.) for colluding with a foreign power, or for Democrats (if not, in the form of official censure, etc.) who have then -- as a political ploy -- claimed for over a year that collusion definitively took place, accusing a sitting president of treason sans evidence.
That's only if a definitive conclusion is reached, though. My guess? It'll come out that some people connected to Trump did things that were questionable / maybe illegal, but not prosecutable, and both sides will declare victory.