Hi Neoman
This is a very interesting questionand we don't really know. Here is my take on it.
If you have positive equity or small negative equity
You are the big losers. The new owners will be salivating. They have probably paid around 50% of the nominal value of the mortgage. Their objective will be to get you to sell and redeem the mortgage.
They will deem your mortgage unsustainable and suggest a voluntary sale.
If you do not want to sell your home, you will have to try to clear your arrears. If you can't clear them, minimise them. Pay at least the interest.
They will begin legal proceedings against you at some stage. However, they presumably will go after the worst cases first. The bigger the arrears, the more likely they are to get a repossession order from the court.
If you have big negative equity
I think that their strategy will be to get you to agree to a voluntary sale. They will probably write off the shortfall if you have no means to pay it.
So I see no point in continuing to make payments in this situation. You will need the money to pay a deposit on a rental property.