It'll reaffirm that he's a horrible business man, and possibly a criminal. But nothing of substance will happen.
It'll show his worst nightmare. He's not a billionaire.
One of the theories in 2015 was that Trump did not just try to run for President for a bigger pay out at The Apprentice
but also that his 'business empire' was on the verge of bankruptcy again and the DC project was underwater.
He needed a way to make money fast and fill up the new DC hotel.
A number of articles highlighted the dire state of Trump's properties during that time, including Trump Tower which was half deserted and poorly maintained.
Further adding to this speculation was the fact that Trump had charged his campaign and the secret service much higher rents for the space they rented at Trump Tower.
Plus when pressed he did not want to fund his own campaign with cash (as he told his supporters he would) and only gave out some vague loan guarantees.
Until at some point they needed money fast and somehow, somewhere he coughed up a few million of the sum they requested with the understanding that it would be repaid in full even if he would lose.
The inauguration, which was basically a money laundering scam from top to bottom may have been the way to 'repay' his friends.
Remember that Cohen paid Stormy out of his own pocket and Trump didn't reimburse him until after the election.