Nothing honestly. You can take a number in the bankruptcy proceeding and find out with the rest of the claimants that there is not enough money to pay claims.
If there are no longer any repercussions then I would downgrade the Unites States as a place where one should invest. Theses kinds of shenanigans is what you have in developing nations and is the reason they face such high interest rates and reluctance from foreign investments.
Tesla, Apple, & Amazon and other huge companies are serial union busters. The NLRB gives them a stern finger shake each time. There are no consequences for treating your labor source poorly in the US
